DOCSLIB.ORG

Pdf/29/1/87/4005966/87 29 1 Cm.Pdf by Guest on 29 September 2021 88 the CANADIAN MINERALOGIST

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Pdf/29/1/87/4005966/87 29 1 Cm.Pdf by Guest on 29 September 2021 88 the CANADIAN MINERALOGIST Canadian Mineralogist Yol.29, pp. 87-93(1991) STRONTIOWHITLOCKITE,SrrMg(PO3OH)(POr6, A NEW MINERALSPECIES FROMTHE KOVDORDEPOSIT, KOLA PENINSULA,U.S.S.R. SERGEI N. BRITVIN, YAKOV A. PAKHOMOVSKII, ALLA N. BOGDANOVA aNo VLADIMIR I. SKIBA GeologicalInstitute, Kola ScienceCentre of the U.S.S.R.Academy of Sciencx,Apatity, U.S.S.R. ABSTRACT par poids. La formule iddale serait donc SreMg(PO3OH)(POdo.Densit6 3.64(2) mesur6e, 3.60 Strontiowhitlockite, the Sr-dominant analog of whit- caicul6e,Le spectred'absorption infra-rouge montre des lockite, occurs in the Kovdor deposit, Kola Peninsula, bandesi 1090,1030, 955, 595 et 555cm-r. U.S.S.R.,within cavitiesin a dolomitecarbonatite vein that cross-cutspyroxenite. Aggregates are pipeJike, with radial (Traduitpar la R6daction) structurein cross-section,and are composedof rosettesof roundedcrystals tabular on {001}, asmuch as 8 pm across. Mots-cbs;strontiowhitlockite, nouvelle espbce min6rale, Associatedminerals are dolomite, plrite, collinsiteand an carbonatite,phosphate, structure de la whitlockite, unnamedSr-Mg phospate.Strontiowhitlockite is dull white, gisementde Kovdor, p6ninsule de Kola, U.R.S.S. transluscent,with a white streak.Cleavage is moderateon {001}. It is opticaly uniaxial(-), with to 1.601(2),e 1.598(2) for \ = 589nm. By analogywith whitlockite, thp mineral INTRoDUCTION ig hexagonal,R3c, with a 10.644(9),c 39.54(6)A, Z 3880 At, Z = 6^.The strongestfive X-ray-powder diffraction Whitlockite was initially describedby Frondel lines[d in A(I)(/?k0] are s.33Q5)(ll0), 3.288(37X0.0.r2,2t4), (1941)and was interpretedto be naturally occurring 3.07I (29X030), I 0), 2.661(80)(220). Elec- 3.004(100X0.2. (Frondel Numerous investiga- tron-microprobeanalyses gave CaO 5.5, SrO 5l.4,BaO 2.3, B-Ca3(PO)2 1943). MgO 4.6, MnO 0.2, FeO 0.2, P2O535.2, H2O 0.5 (by tions since then have been devoted to both B- coulometry), total 99.9 wt.9o. The ideal formula is Car(POn)r,its isostructuralcompounds, and whit- SreMg(PO3OH)(POdo.Dn 3.64(2),Dc 3.60 g/cm3. The lockite. Studiesby Calvo & Gopal (1975),Schroeder infrared-absorption spectrumincludes rhe following bands: et al. (1977)and Moore & Shen(1983) showed that 1090,1030, 955, 595, and 555cm-l. whitlockite, ideally CarMg(PO3OHXPOJ.,differs from B-Ca3(PO)2.The mineral is relatedto a series Keywords; strontiowhitlockite, new mineral species,car- of isotypic compounds with the general formula phosphate, bonatite, whitlockite structure, Kovdor AyB(Xqn(XO? y)6(I,OH,F)3, where cations of deposit,Kola Peninsula,U.S.S.R. the.4 groupare iepresented by Ca2*,RE'E3+, Na*; the B group includesMg2*, Fd*, Fe3*,Al3*, x SovnernE may be p5+, gi4+ or Al3+, and YrepresentsO2-, OH- or F. All of theseisotypic compounds are syn- La strontiowhitlockite,analogue de la whitlockite avec thetic. cerite-(ce), 6sr+rpe3+(sio3oHXSio4)6 le Sr commecation dominant, a 6t€ d6couvertedans le gise- (OH): (Moore & Shen 1983) is the only other ment deKovdor, situ6dans la p6ninsulede Kola, U.R.S.S.; mineral isostructuralwith whitlockite. elle occupedes cavit6s d'un filon de carbonatitedolomiti The new species, strontiowhitlockite, que qui pyroxdnite. recoupeune Les agr6gatsde cristaux SreMg(PO3OH)(PO4)6,is defined as the Sr- allong6smontrent une texture transversaleradiaire, et con- dominant (in the,4 group) analogof whitlockite. It sistentde rosettesde cristaux arrondis aplatis sur {001}, et mesuantjusqu'd 8 pm enlargeur. Lui sontassocies dolo- was found in a specimenof dolomite carbonatitecol- mite, plrire, collinsiteet un phosphatede Sr-Mg sansnom. lected in the summer of 1985 from the Kovdor La strontiowhitlockite estblanc terne, translucide,avec une deposit,Kola Peninsula,U.S.S.R. Both the species rayr:reblanche. Le clivage{001 } estmoyen. Elle estuniaxe and the name have beenapproved by the Commis- n6gative,avec co 1.601(2), e 1.598(2)pour X = 589nm. Par sion on New Minerals and Mineral Names,I.M.A. analogieavec la whitlockite, c'est yn min6rallexagonal, (l-2 -- The holotype specimenof strontiowhitlockite R3c, aveca 10.644(9),c 39.54(6)A, Z 38804", Z 6. mg of the mineral) is preservedin the Fersman plus Les 1:inqraies les intensesdu clich6 de diffraction [d MineralogicalMuseum of the U.S.S.R. Academyof itA)(AcU I en sont s.33(25X10), 3.288(37)(0.0.r2,2r4), (registration no. 558)' and the 3.071 (29)(030), 3.004(1 00X0.2. I 0), et 2.66 I (80)(220). Les Sciences,Moscow analysesd la microsonde€lectronique ont donn6CaO 5.5, grain mount used for microprobe analysis is on SrO 51.4,BaO 2.3, MgO 4.6, MnO 0.2, FeO 0.2, P2O5 depositin the Museumof Mines, Institute of Mines, 35.2, H2O 0.5 (par coulom€trie),pour un total de 99.9q0 Leningrad. 87 Downloaded from http://pubs.geoscienceworld.org/canmin/article-pdf/29/1/87/4005966/87_29_1_cm.pdf by guest on 29 September 2021 88 THE CANADIAN MINERALOGIST OccunnsNcr after dolomite, including collinsite, bobierrite, vivianite (Kukharenkoet al,1965) and kovdorskite The Kovdor ultramafic alkalinecomplex, of Mid- (Kapustin et al. l98l\. dle Paleozoic age (338-426Ma), is located in the An interesting60-m long vein of dolomite car- southwesternpart of the Kola Peninsula,U.S.S.R. bonatitethat cross-cutspyroxenites (jacupirangites) (67o35'N, 30o20'E),and is emplacedin Archean was exposedduring mining operationsin 1985and gneissesand granitic gneisses(1800-2000 Ma). The includesnumerous cm-size cavities involving phos- complex (40.5 km2) is elliptical in shapeand con- phates,mainly carbonatefluorapatite as well as col- centrically zoned (Kukharenko et al. 1965)from core linsiteand bobierrite.Strontiorvhitlockite (about 5-6 to rim; dunitesand "pyroxenized" and "phlogopi- mg of the mineral)was found in a cavity I cm across tized" dunitesin the coregive way to jacupirangites in the central zone of the vein, in associationwith and melteigites,melilite rocks, ijolites and other budlike aggregatesof strontian collinsite (6.3V0 nepheline-pyroxenerocks, and an outside ring of SrO), octahedralcrystals of pyrite and rhombohedra fenites. The Kovdor magnetite-apatite-baddeleite of dolomite. An unnamed Sr-Mg COr-bearing deposit is located in the southwesternpart of the hydrous phosphate(hereafter referred to as Sr-Mg complex;it is emplacedwithin contact of ijolites with phosphate)is intimately intergrown with the stron- fenites.In general,the igneousrocks exposedin the tiowhitlockite. quarry (the Iron mine) are forsterite-magnetite (with apatite)ore-rocks and pyroxenites(jacupirangites). PHYSIcALPnopnnrrss A variety of calcite-magnetite and dolomite- magnetiteores seem to be connectedwith a later, car- Strontiowhitlockite occursas pipes and roselike bonatite stageof formation of the deposit. Acces- aggregatescomposed of rounded tabular crystals sory baddeleiteis presentin both forsterite-magnetite (Figs. 1,2). Crystalsas much as 5-8 pm acrossare and carbonate-bearingores. flattenedon {001}. Aggregatesresembling pipes are Veinsof carbonatitecross-cut rocks and ores,and the most interesting.At high magnification (Fig. lb), are widespreadthroughout the deposit.The carbona- the pipes,up to 2 mm long and20 pm in diameter, tites can be dividedinto the following groups,based show a radial structure, suchthat the [001] axis of on mineralogical criteria (Krasnova & Kopylova each crystal is subparallelto the direction of pipe 1988): calcite carbonatites with forsterite and elongation. The inner channelsof the pipes are phlogopite, calcite carbonatiteswith ferriphlogopite, occupiedby "spindles" of the Sr-Mg phosphate, dolomite carbonatites with zircon, and calcite- which exhibit a hexagonalcross-section. dolomite carbonatiteswith ilmenite. Dolomite car- Strontiowhitlockite is white with a dull luster, bonatitescontaining zircon are of pertinencehere. translucent,and has a white streak. The hardness There is hydrothermal phosphate mineralization cannot be measured accurately owing to small Ftc. l. Pipescomposed of strontiowhitlockitewith inner "spindles" composedof Sr-Mg phosphate.SEM image;width of field of view is 290 pm (A) and 40 pm (B). Downloaded from http://pubs.geoscienceworld.org/canmin/article-pdf/29/1/87/4005966/87_29_1_cm.pdf by guest on 29 September 2021 STRONTIOWHITLOCKITE FROM THE KOLA PENINSULA 89 crystal-sizeand compositenature. A moderate{001} cleavage(or parting) is present,and was observed by SEM. The measureddensity D. was determined by flotation of pipe fragmentsusing a dilute Clerici - H2Osolution, and found tobe3.64(2)g/cm3; D" is 3.60g/cm3. In immersionliquids, the mineral is colorlessand nonpleochroic. The axial character cannot be observeddirectly becauseof small crystal-size,but pipesof the mineral show strong parallel extinction under crossedpolarizers; the smallerindex of refrac- tion coincideswith [001]of the crystals.If thesedata are taken into accountalong with the fact that the mineral is isostructural with whitlockite, stron- tiowhitlockite should be uniaxial (-), with a coof 1.601(2)and a e of 1.598(2)for tr : 589nm. Using the Gladstone-Daleconstants (Mandarino 1979),the calculatedindex of compatibility is 0.012, indicat- ing "superior" agreementof optical, physicaland chemicaldata. Frc. 2. RoseJikeaggregates cor{rposed of strontiowhitlock- ite crystals.SEM image;wid]th of field of view is 15pm. CnysreLLocnepHy The strontiowhitlockitecrystals are too small for phosphatewere performed on a CAMECA MS-46 single-crystal study, and only X-ray powder- instrument with wavelengt[r-dispersionspectrome- diffraction techniques were used. Synthetic 0- ters, usingthe following stafrdards:lorenzenite (for (Sr2.5tMgo.rr)":.oo(POJzwas preparedaccording to Na), diopside(Ca),
Load more

Recommended publications
  • L. Jahnsite, Segelerite, and Robertsite, Three New Transition Metal Phosphate Species Ll. Redefinition of Overite, an Lsotype Of
    American Mineralogist, Volume 59, pages 48-59, 1974 l. Jahnsite,Segelerite, and Robertsite,Three New TransitionMetal PhosphateSpecies ll. Redefinitionof Overite,an lsotypeof Segelerite Pnur BnnN Moone Thc Departmcntof the GeophysicalSciences, The Uniuersityof Chicago, Chicago,Illinois 60637 ilt. lsotypyof Robertsite,Mitridatite, and Arseniosiderite Peur BmaN Moonp With Two Chemical Analvsesbv JUN Iro Deryrtrnent of GeologicalSciences, Haraard Uniuersity, Cambridge, Massrchusetts 02 I 38 Abstract Three new species,-jahnsite, segelerite, and robertsite,-occur in moderate abundance as late stage products in corroded triphylite-heterosite-ferrisicklerite-rockbridgeite masses, associated with leucophosphite,hureaulite, collinsite, laueite, etc.Type specimensare from the Tip Top pegmatite, near Custer, South Dakota. Jahnsite, caMn2+Mgr(Hro)aFe3+z(oH)rlPC)oln,a 14.94(2),b 7.14(l), c 9.93(1)A, p 110.16(8)", P2/a, Z : 2, specific gavity 2.71, biaxial (-), 2V large, e 1.640,p 1.658,t l.6lo, occurs abundantly as striated short to long prismatic crystals, nut brown, yellow, yellow-orange to greenish-yellowin color.Formsarec{001},a{100},il2oll, jl2}ll,ft[iol],/tolll,nt110],andz{itt}. Segeierite,CaMg(HrO)rFes+(OH)[POdz, a 14.826{5),b 18.751(4),c7.30(1)A, Pcca, Z : 8, specific gaavity2.67, biaxial (-), 2Ylarge,a 1.618,p 1.6t5, z 1.650,occurs sparingly as striated yellow'green prismaticcrystals, with c[00], r{010}, nlll0l and qll2l } with perfect {010} cleavage'It is the Feg+-analogueofoverite; a restudy on type overite revealsthe spacegroup Pcca and the ideal formula CaMg(HrO)dl(OH)[POr]r. Robertsite,carMna+r(oH)o(Hro){Ponlr, a 17.36,b lg.53,c 11.30A,p 96.0o,A2/a, Z: 8, specific gravity3.l,T,cleavage[l00] good,biaxial(-) a1.775,8 *t - 1.82,2V-8o,pleochroismextreme (Y, Z = deep reddish brown; 17 : pale reddish-pink), @curs as fibrous massesand small wedge- shapedcrystals showing c[001 f , a{1@}, qt031}.
    [Show full text]
  • Raman and Infrared Spectroscopy of Arsenates of the Roselite and Fairfeldite Mineral Subgroups
    This may be the author’s version of a work that was submitted/accepted for publication in the following source: Frost, Ray (2009) Raman and infrared spectroscopy of arsenates of the roselite and fair- feldite mineral subgroups. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 71(5), pp. 1788-1794. This file was downloaded from: https://eprints.qut.edu.au/17596/ c Copyright 2009 Elsevier Reproduced in accordance with the copyright policy of the publisher. Notice: Please note that this document may not be the Version of Record (i.e. published version) of the work. Author manuscript versions (as Sub- mitted for peer review or as Accepted for publication after peer review) can be identified by an absence of publisher branding and/or typeset appear- ance. If there is any doubt, please refer to the published source. https://doi.org/10.1016/j.saa.2008.06.039 QUT Digital Repository: http://eprints.qut.edu.au/ Frost, Ray L. (2009) Raman and infrared spectroscopy of arsenates of the roselite and fairfieldite mineral subgroups. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 71(5). pp. 1788-1794. © Copyright 2009 Elsevier Raman and infrared spectroscopy of arsenates of the roselite and fairfieldite mineral subgroups Ray L. Frost• Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane Queensland 4001, Australia. Abstract Raman spectroscopy complimented with infrared spectroscopy has been used to determine the molecular structure of the roselite arsenate minerals of the roselite and 2+ fairfieldite subgroups of formula Ca2B(AsO4)2.2H2O (where B may be Co, Fe , Mg, 2- Mn, Ni, Zn).
    [Show full text]
  • New Mineral Names*,†
    American Mineralogist, Volume 106, pages 1360–1364, 2021 New Mineral Names*,† Dmitriy I. Belakovskiy1, and Yulia Uvarova2 1Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18 korp. 2, Moscow 119071, Russia 2CSIRO Mineral Resources, ARRC, 26 Dick Perry Avenue, Kensington, Western Australia 6151, Australia In this issue This New Mineral Names has entries for 11 new species, including 7 minerals of jahnsite group: jahnsite- (NaMnMg), jahnsite-(NaMnMn), jahnsite-(CaMnZn), jahnsite-(MnMnFe), jahnsite-(MnMnMg), jahnsite- (MnMnZn), and whiteite-(MnMnMg); lasnierite, manganflurlite (with a new data for flurlite), tewite, and wumuite. Lasnierite* the LA-ICP-MS analysis, but their concentrations were below detec- B. Rondeau, B. Devouard, D. Jacob, P. Roussel, N. Stephant, C. Boulet, tion limits. The empirical formula is (Ca0.59Sr0.37)Ʃ0.96(Mg1.42Fe0.54)Ʃ1.96 V. Mollé, M. Corre, E. Fritsch, C. Ferraris, and G.C. Parodi (2019) Al0.87(P2.99Si0.01)Ʃ3.00(O11.41F0.59)Ʃ12 based on 12 (O+F) pfu. The strongest lines of the calculated powder X-ray diffraction pattern are [dcalc Å (I%calc; Lasnierite, (Ca,Sr)(Mg,Fe)2Al(PO4)3, a new phosphate accompany- ing lazulite from Mt. Ibity, Madagascar: an example of structural hkl)]: 4.421 (83; 040), 3.802 (63, 131), 3.706 (100; 022), 3.305 (99; 141), characterization from dynamic refinement of precession electron 2.890 (90; 211), 2.781 (69; 221), 2.772 (67; 061), 2.601 (97; 023). It diffraction data on submicrometer sample. European Journal of was not possible to perform powder nor single-crystal X-ray diffraction Mineralogy, 31(2), 379–388.
    [Show full text]
  • Collinsite in Hydrothermal Assemblages Related to Carbonatites in the Kovdor Complex, Northwestern Russia
    1081 The Canadian Mineralogist Vol. 39, pp. 1081-1094 (2001) COLLINSITE IN HYDROTHERMAL ASSEMBLAGES RELATED TO CARBONATITES IN THE KOVDOR COMPLEX, NORTHWESTERN RUSSIA RUSLAN P. LIFEROVICH§ Institute of Geosciences, University of Oulu, PL-3000, FIN-90014 Oulu, Finland YAKOV A. PAKHOMOVSKY, ALLA N. BOGDANOVA AND ELENA G. BALAGANSKAYA Geological Institute, Kola Science Centre, Russian Academy of Sciences, 14 Fersmana Street, 184200-RU Apatity, Russia KAUKO V.O. LAAJOKI AND SEPPO GEHÖR Institute of Geosciences, University of Oulu, PL-3000, FIN-90014 Oulu, Finland NIKITA V. CHUKANOV Institute of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow Region, 142432, Russia ABSTRACT Several generations of collinsite were formed during the hydrothermal alteration of phoscorite and dolomite carbonatite in the Kovdor alkaline-ultramafic complex, northwestern Russia. The collinsite at this locality shows isomorphic substitution of Sr for Ca at the A crystallographic site, which is atypical both for this species and for the entire fairfieldite group. The Sr content reaches 0.74 atoms per formula unit and shows an inverse correlation with Ca. Sr is found to account for no more than 37% of the total occupancy of the A site, a proportion that fits the Lewis acidity of interstitial cations, a value of 0.25 valence units (assuming a disordered distribution of Sr), which in turn matches the Lewis basicity of the structural unit in collinsite, the chain [Mg(PO4)2(H2O)2]. The collinsite-bearing assemblages were formed by juvenile hydrothermal solutions derived from phoscorites and carbonatites that had been cooling in a tectonically active environment. Textural evidence and strontium isotopic character- istics show that the assemblages were superimposed upon the host rocks after the cataclasis of the dolomite carbonatite and selective leaching of its primary minerals.
    [Show full text]
  • A Specific Gravity Index for Minerats
    A SPECIFICGRAVITY INDEX FOR MINERATS c. A. MURSKyI ern R. M. THOMPSON, Un'fuersityof Bri.ti,sh Col,umb,in,Voncouver, Canad,a This work was undertaken in order to provide a practical, and as far as possible,a complete list of specific gravities of minerals. An accurate speciflc cravity determination can usually be made quickly and this information when combined with other physical properties commonly leads to rapid mineral identification. Early complete but now outdated specific gravity lists are those of Miers given in his mineralogy textbook (1902),and Spencer(M,i,n. Mag.,2!, pp. 382-865,I}ZZ). A more recent list by Hurlbut (Dana's Manuatr of M,i,neral,ogy,LgE2) is incomplete and others are limited to rock forming minerals,Trdger (Tabel,l,enntr-optischen Best'i,mmungd,er geste,i,nsb.ildend,en M,ineral,e, 1952) and Morey (Encycto- ped,iaof Cherni,cal,Technol,ogy, Vol. 12, 19b4). In his mineral identification tables, smith (rd,entifi,cati,onand. qual,itatioe cherai,cal,anal,ys'i,s of mineral,s,second edition, New york, 19bB) groups minerals on the basis of specificgravity but in each of the twelve groups the minerals are listed in order of decreasinghardness. The present work should not be regarded as an index of all known minerals as the specificgravities of many minerals are unknown or known only approximately and are omitted from the current list. The list, in order of increasing specific gravity, includes all minerals without regard to other physical properties or to chemical composition. The designation I or II after the name indicates that the mineral falls in the classesof minerals describedin Dana Systemof M'ineralogyEdition 7, volume I (Native elements, sulphides, oxides, etc.) or II (Halides, carbonates, etc.) (L944 and 1951).
    [Show full text]
  • The Crystal Structure of the Mineral Scholzite and a Study of the Crystal
    \ I 7'1,71 ¡1 :), THE CRYSTAL STRUCTURE OF THE MINERAL SCHOLZITE AND A STUDY OF THE CRYSTAL CHEMISTRY OF SOME RELATED PHOSPHATE AND ARSENATE MINERALS A thesis submitted for the Degree of Doctor of PhilosoPhY at the University of Adelaide in April, 1975 by R0DERICK JEFFREY HILL, B.Sc. (Hons.) Department of Geology and Mineralogy Au/¿tr¡'t ,,! /'/,".'','-'"' ' TABLE OF CONTENTS Page SUMMARY (i) STATEMENT OF ORIGINATITY (ii) ACKNOWLEDGEMENTS (iii) GENERAL INTRODUCTION I CHAPTER 1 TIIE GEOI.OGY AbID MINERALOGY OF REAPHOOK HILL, SOUTTI AUSTR.ALIA 2 1.1 ABSTR,ACT 2 r.2 INTRODUCTTON 2 1.3 GEOIÐGICAL SETTING 3 I.4 EXPERTMENTAI TECHNIQT ES 5 1.5 THE MAJOR PHOSPHATE MTNERALS 6 1.5.1 Tarbuttite - Znr(po4) (OH) 6 1.5.2 Parahopeite ZnrZn(pOn) - Z.4HZo 9 I.5.3 Scholzite CaZnU(pO4) - 2.2H2O 9 1.5.4 Zincian Collinsite Car(Mg,Zn) (pO4) - 2.2H2O 15 1.6 ASPECTS OF EHE CRYSTA¡ CHEMISTRY OF THE MAJOR PHOSPHATE MINERALS 19 L.7 PARAGENESIS 23 1.7.1 Major Minerals 23 L.7.2 Other lvlinerals 26 1.7.3 Conclusions 27 CHAPTER 2 TIIE CRYSTAI STRUCTURE OF SCHOLZITE 30 2.L ABSTRACT 30 2.2 INTRODUCTION 32 2.3 DATA COLLECTION AND ÐATA REDUCTION 32 2.4 DISCUSSION OF TITE INTENSITY DISTRIBUTION 35 2.4.L Subcell Structure and pseudosynunetry 35 2.4.2 Dete::mination of the True Syrnmetry 4L 2.4.3 Structural Disorder 4l 2.5 STRUqrURE SOLUTION AND REFINEMENT OF THE AVER.AGE ST'BCELL 52 2.6 DESCRIPTION AND DISCUSSION OF THE AVERAGE ST]BCELL STRUCTURE 60 2.6.I Topology 60 2.6.2 Disorder 65 2.6.3'iThermal" parameters 67 2.7 STRUCTURE SOLUTION AND REFTNEMENT OF TITE },IAIN CELL
    [Show full text]
  • Description and Unique Crystal-Structure of Waterhouseite, a New Hydroxy Manganese Phosphate Species from the Iron Monarch Deposit, Middleback Ranges, South Australia
    1401 The Canadian Mineralogist Vol. 43, pp. 1401-1410 (2005) DESCRIPTION AND UNIQUE CRYSTAL-STRUCTURE OF WATERHOUSEITE, A NEW HYDROXY MANGANESE PHOSPHATE SPECIES FROM THE IRON MONARCH DEPOSIT, MIDDLEBACK RANGES, SOUTH AUSTRALIA ALLAN PRING§ Department of Mineralogy, South Australian Museum, North Terrace, Adelaide, South Australia 5000, and School of Earth & Environmental Science, University of Adelaide, Adelaide, S.A. 5005, Australia UWE KOLITSCH Institut für Mineralogie und Kristallographie, Geozentrum, Universität Wien, Althanstr. 14, A–1090 Wien, Austria WILLIAM D. BIRCH Department of Mineralogy, Museum of Victoria, GPO Box 666E, Melbourne, Victoria, 3000, Australia ABSTRACT Waterhouseite from the Iron Monarch mine, Iron Knob, South Australia, is a new hydroxy manganese phosphate species that has a unique crystal-structure. The mineral was found in a carbonate-rich zone with gatehouseite, seamanite, rhodochrosite, shigaite, barite, hausmannite and hematite. It occurs as divergent sprays of orange-brown to dark brown bladed crystals up to 1 mm in length but only up to 20 ␮m in thickness. The crystals are transparent with a pearly luster on cleavages, but it is vitreous to pearly on the tabular faces. The mineral is brittle, with a conchoidal fracture and a yellowish brown streak. There is a perfect cleavage on (100) and a probable cleavage on (001). The crystals show the principal forms {100} (dominant), {010}, {011} and {001}. All crystals are twinned on (100) by non-merohedry. The Mohs hardness is estimated to be ~4, and the measured density is 3.55(5) g/cm3 (calculated density is 3.591 g/cm3). Crystals are biaxial negative and length-slow, with ␣ 1.730(3), ␤ ~1.738 and ␥ 1.738(4), but 2V could not be measured.
    [Show full text]
  • Hillite, a New Member of the Fairfieldite Group: Its Description and Crystal Structure
    981 The Canadian Mineralogist Vol. 41, pp. 981-988 (2003) HILLITE, A NEW MEMBER OF THE FAIRFIELDITE GROUP: ITS DESCRIPTION AND CRYSTAL STRUCTURE OLGA V. YAKUBOVICH§ Department of Crystallography, Moscow Lomonosov State University, Vorob’evy Gory, 119899 Moscow, Russia WERNER MASSA Fachbereich Chemie der Philipps-Universität und Wiss. Zentrum f. Materialwissenschaften, Hans-Meerwein-Straße, D-35043 Marburg, Germany § RUSLAN P. LIFEROVICH Department of Geology, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada POLINA G. GAVRILENKO Department of Crystallography, Moscow Lomonosov State University, Vorob’evy Gory, 119899 Moscow, Russia ALLA N. BOGDANOVA Geological Institute, Kola Science Center, Russian Academy of Sciences, 184200 Apatity, Russia PEKKA TUISKU Institute of Geosciences, University of Oulu, PL-3000, FIN-90014 Oulu, Finland ABSTRACT Hillite (X in Russian), ideally Ca2(Zn,Mg)[PO4]2•2H2O, is a new zinc-dominant analogue of collinsite, isostructural with fairfieldite. It occurs in unmetamorphosed sediments of the Lower Cambrian Parachilna Formation, Reaphook Hill, South Australia, Australia, in association with zincian collinsite and scholzite. Hillite is triclinic, a 5.736(1), b 6.767(2), c 5.462(1) Å, ␣ 97.41(2), ␤ 108.59(2), ␥ 107.19(2)°, V 186.05(8) Å3, space group P1,¯ Z = 1. The average result of fifteen electron-microprobe analyses of relatively homogeneous crystals of the latest generation is: Na2O 0.11, CaO 30.36, MgO 4.34, ZnO 14.79, FeO 0.04, P2O5 40.85, H2Ocalc 10.23 (calculated to give 2 H2O), total 100.72 wt.%. The single crystals of hillite do not exceed 50 ␮m in length; larger aggregates are rather inhomogeneous in terms of Zn:Mg ratio.
    [Show full text]
  • Infrared and Raman Spectroscopic Characterization of the Phosphate Mineral 2+ 2+ Fairfieldite – Ca2(Mn ,Fe )2(PO4)22(H2O) ⇑ Ray L
    Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 106 (2013) 216–223 Contents lists available at SciVerse ScienceDirect Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy journal homepage: www.elsevier.com/locate/saa Infrared and Raman spectroscopic characterization of the phosphate mineral 2+ 2+ fairfieldite – Ca2(Mn ,Fe )2(PO4)2Á2(H2O) ⇑ Ray L. Frost a, , Yunfei Xi a, Ricardo Scholz b, Fernanda Maria Belotti c, Andres Lopez a a School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia b Geology Department, School of Mines, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG 35,400-00, Brazil c Federal University of Itajubá, Campus Itabira, Itabira, MG 35,903-087, Brazil highlights graphical abstract " We have studied fairfieldite from Cigana mine of the Eastern Brazilian Pegmatite Province in Minas Gerais. " The chemical formula was determined using an electron probe. " Vibrational spectroscopy was used to determine the structure. " Multiple bands in antisymmetric stretching spectral region provide evidence of symmetry reduction of the phosphate anion. article info abstract Article history: Raman spectroscopy complimented with infrared spectroscopy has been used to determine the molecu- Received 28 November 2012 3À lar structure of the phosphate mineral fairfieldite. The Raman phosphate ðPO4Þ stretching region shows Accepted 8 January 2013 strong differences between the fairfieldite phosphate minerals which is attributed to the cation substitu- Available online 17 January 2013 2À tion for calcium in the structure. In the infrared spectra complexity exists with multiple ðPO4Þ antisym- metric stretching vibrations observed, indicating a reduction of the tetrahedral symmetry.
    [Show full text]
  • Download the Scanned
    CLASSIFICATION OF MINERALS OF THE TYPE fu(XO a)2' nH2O ( Concluded) C. W. Wornn, Harvard. Uniaersity, Combri.d.ge,Mass. \LonnnuedJrjn pdge/)J) CoNrnNrs or Penr 2 Page The Ar(XOr)z 4HzO Family. 787 Parahcpeite .. 788 Anapaite 788 Messelite 790 Phosphophyllite 792 The Relations of Phosphophyllite to Hcpeite 79s Hopeite. 795 Trichalcite 799 The As(XOr)z SHrO Family 800 Choice of Unit Cell 800 Optical Properties 801 Chemistry , 801 Symplesite. 801 Vivianite. 803 Annabergite. 804 Erythrite. 804 K6ttigite. 804 Bobierrite 806 Iloernesite 806 Conclusions 807 Ack nowledgments. 808 Bibliography 808 fnn fu (XO+)z. 4HzO Fenrr,y This family is composed of the triclinic group-parahopeite and ana- paite; the monoclinic member phosphophyllite; and the orthorhombic member-hopeite. The relations between the unit cells of phosphophyl- lite and hopeite are simple and are given in the description of the former. Parahopeite and anapaite have very similar unit cells, their differences being due solely to the variation in cation content. The relation between the cells of the triclinic members and the monoclinic and orthorhombic membersis not clear. The addition of one or more molecules of water to each crystallizing molecule must be accompanied by a completely new bonding arrange- ment, for there is no recognizablerelation between the unit cells of the members of the various families and there is no single factor of the unit cells which varies with the water variation. Thus it is impossible to relate the unit cells of the various families, although there is a definite relation 787 788 C. W. WOLFE between the cell volumes and the number of water molecules.
    [Show full text]
  • The Role of Hydrogen in Selected Oxysalt Minerals
    The Role of Hydrogen in Selected Oxysalt Minerals by Sasha Herwig A Thesis submitted to the Faculty of Graduate Studies of The University of Manitoba in partial fulfilment of the requirements of the degree of MASTER OF SCIENCE Department of Geological Sciences University of Manitoba Winnipeg, Manitoba Canada Copyright © 2009 by Sasha Herwig Library and Archives Bibliotheque et 1*1 Canada Archives Canada Published Heritage Direction du Branch Patrimoine de I'edition 395 Wellington Street 395, rue Wellington OttawaONK1A0N4 OttawaONK1A0N4 Canada Canada Your file Votre reference ISBN: 978-0-494-53049-8 Our file Notre reference ISBN: 978-0-494-53049-8 NOTICE: AVIS: The author has granted a non­ L'auteur a accorde une licence non exclusive exclusive license allowing Library and permettant a la Bibliotheque et Archives Archives Canada to reproduce, Canada de reproduire, publier, archiver, publish, archive, preserve, conserve, sauvegarder, conserver, transmettre au public communicate to the public by par telecommunication ou par I'lnternet, preter, telecommunication or on the Internet, distribuer et vendre des theses partout dans le loan, distribute and sell theses monde, a des fins commerciales ou autres, sur worldwide, for commercial or non­ support microforme, papier, electronique et/ou commercial purposes, in microform, autres formats. paper, electronic and/or any other formats. The author retains copyright L'auteur conserve la propriete du droit d'auteur ownership and moral rights in this et des droits moraux qui protege cette these. Ni thesis. Neither the thesis nor la these ni des extraits substantiels de celle-ci substantial extracts from it may be ne doivent etre imprimes ou autrement printed or otherwise reproduced reproduits sans son autorisation.
    [Show full text]
  • NEW MINERAL NAMES* Jorrn L. Hvrnon Ennsr A. J. Bunxn
    American Mineralogist, Volume 76, pages2020-2026, 1991 NEW MINERAL NAMES* JorrN L. hvrnon CANMET, 555 Booth Street,Ottawa, Ontario KIA OGl, Canada EnNsr A. J. Bunxn Instituut voor Aardwetenschappen,Vrije Universiteite, De Boelelaan 1085, l08l HV, Amsterdam, Netherlands Ankangite* ramdohrite, a new sulfosalt.Doklady Akad. Nauk SSSR (1989),305, 1468-1473(English translation available). Ming Xiong, ZheshengMa,Zhizhong Peng(1989) A new mineral-Ankangite. ChineseScience Bulletin, 34(7), Ramdohrite was described by Ahlfeld in 1930 as 592-596 (in English). AgrPb.SbuS,r,but recent investigations by different au- thors (Mo€lo, Makovicky, Karup-Moller, Borodayev, Electron-microprobeanalysis gave TiO, 54.0891[sic], BaO 20.5927, V,O. 22.3242, Cr,O. 2.0792 wto/o(sum Mozgova and others) have shown that ramdohrite is a member of the andorite-fizelyite homologous series in 99.0852),corresponding to Ba,087 (Ti5 4s2V2 4r,Crorrr)", ,,u- : general O,u, ideally Ba(Ti,V,Cr)rO,u.The valencestate of V was which N 4 and with the formula Ag,- confirmed by X-ray photoelectron spectroscopy;no OH Pb3- r, (Sb,Bi).*"Su; ramdohrite is Ag6Pb,2Sb22S48with vir- or HrO is evident in the infrared pattern. Occursas black, tually the sameunit-cell parametersas fizelyite. Electron- euhedral to subhedral tetragonal prismatic crystals up to microprobe analysis of material from Alyaskitovoye tin-tungsten deposit in Yakutia shows two Bi-rich ram- 0.5 x 0.5 x I mm, showing{100} and {110}; grayish black streak,vitreous to adamantineluster, brittle, VHN'. dohrite phases:Ag 11.8, 10.6,Pb 27.5, 30.0, Sb 21.4, : 874, uneven fracture approximately normal to elon- 23.0,Bi 21.4, 15.4,S 18.5,18.9, total 100.6,97.9wto/o, gation,D-",, : 4.44,D."t : 4.389 g,/cm3with Z : l.
    [Show full text]