DOCSLIB.ORG

Jerrygibbsite, a New Polymorph of Mne(Sioa)C(OH)Z from Franklin

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Jerrygibbsite, a New Polymorph of Mne(Sioa)C(OH)Z from Franklin American Mineralogist, Volume 69, pages 546-552, 1984 Jerrygibbsite, a new polymorph of Mne(SiOa)c(OH)zfrom Franklin, New Jersey, with new data on leucophoenicite Prrr, J. DUNN Department of Mineral Sciences Smithsonian Institution, Washington, D.C. 20560 DoNer-o R. Peacon Department of Geological Sciences University of Michigan, Ann Arbor, Michigan 48109 Wrlrreu B. SruuoNs Department of Earth Sciences University of New Orleans, New Orleans, Louisiana 70148 aNo Enrc J. Essexe Department of Geological Sciences University of Michigan, Ann Arbor, Michigan 48109 Abstract Jerrygibbsite, ideally Mnq(SiO+)+(OH)2,is polymorphous with the Mn-humite sonolite, and a probable member of the leucophoenicitegroup. It occurs as intergrown grains with a typical metamorphic texture at Franklin, New Jersey, intimately associatedwith leuco- phoenicite. It is orthorhombic with spacegroup Pbnm or Pbn21and unit cell parametersa : 4.85(1),b : 10.70(l),and c = 28.17(3)4.The strongestlines in the powder diffraction pattern ared (I): 2.557(lN), 1.806(100),2.869(78),2.752(49),2.702(46),2.362 (39). Optical parametersinclude: biaxial negative,2V = 72", a = 1.77?(4),F = 1.7$G), y: 1.789(4);Z : a, X : b, amd Y: c. The color is violet-pink;the Mohs' hardnessis approximately5.5; the observed density is 4.00(2) and the calculated density is 4.045 g/cm3.The name is in honor of ProfessorGerald V. Gibbs of Virginia Polytechnic Institute and State University. Chemical analytical data for leucophoeniciteindicate that minor amounts of Ca andlor Zn may sel'veto stablilize leucophoenicite-groupminerals relative to humite-groupminerals at Franklin, New Jersey. Introduction We take great pleasure in naming this mineral jerry- During a systematic survey of the chemical composi- qibbsite in honor of Dr. Gerald V. Gibbs, Professor at tion of specimensof leucophoenicite by electron .i"ro- Virginia Polytechnic Institute and State University, in probe analysis, several sampleswere found to be another, recognitionofhis outstandingcontributions to the science but closely related phase. These samples gave X-ray of.mineralogyandthesocietyof mineralogists.Thenew prior publica- powder diffraction fatterns which, although generally mineral afld the name were approved, to similar to those of leucophoenicite and memUe-rsof tne tion, by the Commission on New Minerals and Mineral humite group, were unique and did not match any known Names, IMA. Type material is preserved at the Smithso- species. The powder X-ray diffraction data, combined nian Institution under catalogue numbers C3209 and with the chemical analyses,implied that this material was R.18772(holotypes) and 149037(cotype). a new manganesemember of either the humite or leuco- phoenicite groups. The distinctions between these two Description and physical properties series or families of structures has been described by Jerrygibbsite occurs as a massive mineral in interlock- White and Hyde (1983)and is summarizedin Table l. Our ing anhedralcrystals, up to 0.5 x 2.0 mm, which display a subsequentinvestigation has confirmed that this phaseis typical metamorphic texture; there are no euhedral crys- a new mineral. tals. The hardness (Mohs) is approximately 5.5. The 0003-(MvE4/0506-0546$02.00 DUNN ET AL,: JERRYGIBBSITE 547 Table l. Crystallographicdata and formulae for the leucophoeniciteand humite groups Speci es Ideal formula Spacegroup a D Reference LEUCOPHOEI{ICITEGROUP Jerrygi bbsi te l.lnn(si 0u )o ( 0H ), Pbnm/Pbn2, 4.85 10.70 28.17 90o Presentstudy Present Leucophoenici te Mn7(si04)3(oH)2-tP?,/b - 4.828 I 0.85 11.380 l03.73o study Htl,lITE GRoUP Norbergi te Itsr(si0o)(0H)2 Pbnm 4.7104 10.2718 8.7476 90o Gibbsand Ribbe(1969) Synthetic phase Mnr(si0n)(0H)2 Pbnm 4.869 I 0.796 9.179 900 Francisand Ribbe (1978) ( (1970) Chondrodite l'lgssi o+)z (oH )z -t-P2.lb 4.7284 10.2539 7.8404 109.060Gibbs et al., (1970) Al I eghanyite Hn5(si04)2(0H)2-tP2,/b - 4.8503 I 0.7l98 8.2747 108.640Rentzeperis Hurnite ilsr(si0o)r(0H)2 Pbnm 4.7408 10.2s80 20.8526 9oo Ribbeand cibbs (]97]) Francisand Ribbe (1978) lihnganhunite Mn7(si 04)3( 0H ) z Pbnm 4.815 10.580 21.448 900 Cl i nohumite tlse(si 04 (0H P2,/b 4.7441 r0.2s0r 13.6635l0o.79oRobinson et al. (1973) )4 )2 -t- Sonoli te ilnr(si0o)u(0H)2 -P2. /b 4.872 r0.669 14.287 loo.30 Kato(1978) in t- Ribbe(1980) streak is light pink. The luster is vitreous on both cleav- very similar compositions, but differ slightly in Zn-con- age and fracture surfaces. There is one imperfect cleav- tent. The ratio of lt'f+ ions to siliconis 8.85:4.00(sample age, parallel to {001}. The density, determined using R18772)and 8.78:4.00(sample C3209),Z : 4, both in heavyliquid techniques,is 4.00(2)g/cm3, which compares reasonable agreement with the 9:4 ratio of sonolite, favorably with the calculated value of 4.045 glcm3. which is consistentwith the relation thatjerrygibbsite is a Jerrygibbsite is medium violet-pink in color and light polymorph of Mnq(SiO+)+(OH)2.Although the M2+:Si pink in thin-section. It does not fluoresce when exposed ratio is less than the ideal 9:4, we attribute this to to ultraviolet radiation and there is no cathodolumines- analytical error and not to admixed leucophoeniciteinas- cenceunder the beam ofthe electron microprobe. Grains much as leucophoenicite impurities would increase the typically exhibit lamellar structure, parallel to {001}which ratio to >9:4. and not decreaseit. is defined by lamellae difering in opacity; that is, more transparentlamellae alternate with relatively translucent Table 2. Chemical analysesof jerrygibbsite and lamellae. Aside from this diference, the lamellae are leucophoenicite optically identical. The cause of the ditrerence is not definitely known, but is ascribed tentatively to differ- JERRYGIBBSITE LEUCOPHOENICITE encesin fluid inclusion densities. Optically, jerrygibbsite l,leight Atons per Ueight Atomsper fleight is biaxial negativewith 2V : 72". The indices of refraction percent unit cell percent unit cell percent are a: r.772(4),B:1.783(4) and y: 1.789(a).Jerry- gibbsite pleochroic; si 02 27.1 16.00 26.6 ls.7l 26.2 is not dispersion is moderate to Fe0 0.3 0.15 0.3 0.r5 0.3 strong, r ) v. The orientation of the indicatix is Z = a, t'lgo 1.4 1,23 'II .l 0.97 ?.6 Ca0 0.4 0.25 .0 0.63 5.2 X:b,andI:c. l4n0 64.I 32.05 62.1 3t 05 57.6 Zn0 3.9 1.70 5.3 2 31 5.6 Chemical composition Hzo 2.13* 8.38 2.25* 8.86 2.5+* F 0.0 n.o, n.o. Jerrygibbsite was chemically analyzed with an anr- Total 99.3 98.6 100.0 sruq electron microprobe utilizing an operating voltage * - l{ater detemined by the Penfield rethod. **- l{ater calculated by difference. of 15 kV and a sample current of 0.025 pA, measuredon Accuracyof data: r3t of the amunt present for mior elerents. brass. Water was determined using the Penfield method. standards: hornblende (Si, Fe,lilg,Ca) ; mnganite(Mn); synthetic Zno(Zn); and fluorapatite(F) for sanp'lesRI8772 and 149543. The resultant analyses,together with standardsused, are : synthetic tephroite (Si,l'ln); hornblende(Fe,l'lg,Ca); and (zn). presentedin Table 2. The two jerrygibbsite sampleshave synthetic ZnO 548 DUNN ET AL,: JERRYGIBBSITE X-ray crystallography diffraction patterns were unsuccessful.We subsequently determined that this was due to contamination by other Cleavagefragments from specimensR18772 and C3209 phases.The principal contaminatingphase is leucophoen- have been studied using Weissenberg and precession icite although other Mn-humites such as alleghanyitealso single-crystal techniques,and the results are identical for are found with jerrygibbsite. Indeed, we have been un- all photographs jerrygibbsite crystals. The show that is able to obtain a jerrygibbsite powder pattern which is orthorhombic with space group Pbnm or Pbn21, with entirely free of leucophoenicite contamination. The pat- refined parameters : = unit c-ell a 4.85(l), b 10.70(l),and terns for jerrygibbsite, leucophoenicite, and the Mn- c = 28.17(3)4. This setting of the unit cell translations is humites have many features in common. Becausemulti- used so as to emphasize the relation to the related phase patterns appear to be the rule and not the members group, : of the humite all of which have a 4.9 exception, and because it is difficult to interpret these = andb 10.5A translationsin common; this settingwas patterns even after considerable experience with them, recommended (1969). by Jones The spacegroup identifi- we have gone to some lengths to try to obtain standard, cation is somewhattentative as extinction rules are not as single-phasepatterns of each phase. These patterns were well defined as usual due to the presence of classes of shown to be single-phasein two ways: (l) d-valueslead to systematically weak reflections. For example, very few satisfactory indexing of unit cell parameters, and (2) hOl reflections are observable. We feel that the space reflections known to be characteristic ofother phasesare group as probably determined'is very correct, although found to be very weak (in which case appropriate reflec- there is a possibility that intensities as determined in the tions were subtracted from the pattern) or absent in the course of a structure determination may show that the pattern chosen to be representative of a given single apparent glide-planes are not required in the detailed phase. We have separatelydescribed patterns for allegh- structure. anyite, sonolite,and manganhumite(Winter et al., l9E3) Individual lamellae from the zones defined by translu- and report the leucophoeniciteand jerrygibbsite patterns cency differences noted above were separately studied here (Table 3).
Load more

Recommended publications
  • Washington State Minerals Checklist
    Division of Geology and Earth Resources MS 47007; Olympia, WA 98504-7007 Washington State 360-902-1450; 360-902-1785 fax E-mail: [email protected] Website: http://www.dnr.wa.gov/geology Minerals Checklist Note: Mineral names in parentheses are the preferred species names. Compiled by Raymond Lasmanis o Acanthite o Arsenopalladinite o Bustamite o Clinohumite o Enstatite o Harmotome o Actinolite o Arsenopyrite o Bytownite o Clinoptilolite o Epidesmine (Stilbite) o Hastingsite o Adularia o Arsenosulvanite (Plagioclase) o Clinozoisite o Epidote o Hausmannite (Orthoclase) o Arsenpolybasite o Cairngorm (Quartz) o Cobaltite o Epistilbite o Hedenbergite o Aegirine o Astrophyllite o Calamine o Cochromite o Epsomite o Hedleyite o Aenigmatite o Atacamite (Hemimorphite) o Coffinite o Erionite o Hematite o Aeschynite o Atokite o Calaverite o Columbite o Erythrite o Hemimorphite o Agardite-Y o Augite o Calciohilairite (Ferrocolumbite) o Euchroite o Hercynite o Agate (Quartz) o Aurostibite o Calcite, see also o Conichalcite o Euxenite o Hessite o Aguilarite o Austinite Manganocalcite o Connellite o Euxenite-Y o Heulandite o Aktashite o Onyx o Copiapite o o Autunite o Fairchildite Hexahydrite o Alabandite o Caledonite o Copper o o Awaruite o Famatinite Hibschite o Albite o Cancrinite o Copper-zinc o o Axinite group o Fayalite Hillebrandite o Algodonite o Carnelian (Quartz) o Coquandite o o Azurite o Feldspar group Hisingerite o Allanite o Cassiterite o Cordierite o o Barite o Ferberite Hongshiite o Allanite-Ce o Catapleiite o Corrensite o o Bastnäsite
    [Show full text]
  • TRAVERTINE-MARL DEPOSITS of the VALLEY and RIDGE PROVINCE of VIRGINIA - a PRELIMINARY REPORT David A
    - Vol. 31 February 1985 No. 1 TRAVERTINE-MARL DEPOSITS OF THE VALLEY AND RIDGE PROVINCE OF VIRGINIA - A PRELIMINARY REPORT David A. Hubbard, Jr.1, William F. Gianninil and Michelle M. Lorah2 The travertine and marl deposits of Virginia's Valley and Ridge province are the result of precipitation of calcium carbonate from fresh water streams and springs. Travertine is white to light yellowish brown and has a massive or concretionary structure. Buildups of this material tend to form cascades or waterfalls along streams (Figure 1). Marl refers to white to dark yellowish brown, loose, earthy deposits of calcium carbonate (Figure 2). Deposits of these carbonate materials are related and have formed during the Quaternary period. This preliminary report is a compilation of some litei-ature and observations of these materials. A depositional model is proposed. These deposits have long been visited by man. Projectile points, pottery fragments, and firepits record the visitation of American Indians to Frederick and Augusta county sites. Thomas Jefferson (1825) wrote an account of the Falling Spring Falls from a visit prior to 1781. Aesthetic and economic considerations eontinue to attract interest in these deposits. 'Virginia Division of Mineral Resources, Charlot- Figure 1. Travertine waterfall and cascade series tesville, VA on Falling Springs Creek, Alleghany County, 2Department of Environmental Sciences, Univer- Virginia. Note man standing in center of left sity of Virginia, Charlottesville, VA margin. 2 VIRGINIA DIVISION OF MINERAL RESOURCES Vol. 31 Figure 2. An extensive marl deposit located in Figure 3. Rimstone dam form resulting from Frederick County, Virginia. Stream, in fore- precipitation of calcium carbonate in Mill Creek, ground, has incised and drained the deposit.
    [Show full text]
  • Mineral Processing
    Mineral Processing Foundations of theory and practice of minerallurgy 1st English edition JAN DRZYMALA, C. Eng., Ph.D., D.Sc. Member of the Polish Mineral Processing Society Wroclaw University of Technology 2007 Translation: J. Drzymala, A. Swatek Reviewer: A. Luszczkiewicz Published as supplied by the author ©Copyright by Jan Drzymala, Wroclaw 2007 Computer typesetting: Danuta Szyszka Cover design: Danuta Szyszka Cover photo: Sebastian Bożek Oficyna Wydawnicza Politechniki Wrocławskiej Wybrzeze Wyspianskiego 27 50-370 Wroclaw Any part of this publication can be used in any form by any means provided that the usage is acknowledged by the citation: Drzymala, J., Mineral Processing, Foundations of theory and practice of minerallurgy, Oficyna Wydawnicza PWr., 2007, www.ig.pwr.wroc.pl/minproc ISBN 978-83-7493-362-9 Contents Introduction ....................................................................................................................9 Part I Introduction to mineral processing .....................................................................13 1. From the Big Bang to mineral processing................................................................14 1.1. The formation of matter ...................................................................................14 1.2. Elementary particles.........................................................................................16 1.3. Molecules .........................................................................................................18 1.4. Solids................................................................................................................19
    [Show full text]
  • Sussexite Mn2+BO2(OH)
    2+ Sussexite Mn BO2(OH) c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Monoclinic. Point Group: 2/m. As bladed acicular crystals, to 7 mm; cross-vein or radial fibrous, in felted or matted aggregates, nodular. Twinning: Submicroscopic twinning on {100} which cannot be resolved optically. Physical Properties: Tenacity: Inflexible. Hardness = 3–3.5 D(meas.) = 3.30 D(calc.) = 3.335 Optical Properties: Semitransparent. Color: White to buff, straw-yellow, pale pink; colorless in transmitted light. Streak: White. Luster: Silky, dull, earthy. Optical Class: Biaxial (–). Orientation: Parallel extinction; X = elongation; Z ⊥ flattening. Dispersion: r> v. α= 1.670 β = 1.728 γ = 1.732 2V(meas.) = ∼25◦ Cell Data: Space Group: P 21/a. a = 12.866(3) b = 10.718(2) c = 3.287(1) β =94.75(3)◦ Z=8 X-ray Powder Pattern: N’chwaning II mine, South Africa. 6.43 (10), 2.773 (7), 3.34 (6), 2.632 (6), 2.494 (6), 2.741 (5), 2.694 (5) Chemistry: (1) (3) B2O3 30.52 30.33 FeO 0.16 MnO 49.40 61.82 MgO 9.56 CaO 2.03 H2O 8.33 7.85 Total [100.00] 100.00 (1) Franklin, New Jersey, USA; recalculated to 100% after deduction of willemite 4.5%. (2) N’chwaning II mine, South Africa; by electron microprobe, analysis not given; stated to correspond to (Mn0.95Mg0.05)Σ=1.00BO2(OH). (3) MnBO2(OH). Polymorphism & Series: Forms a series with szaib´elyite. Occurrence: A rare hydrothermal mineral typically in veinlets in boron-bearing metamorphosed Mn–Fe–Zn deposits.
    [Show full text]
  • The Picking Table Volume 27, No. 1 – Spring 1986
    TABLE JOURNAL of the FRANKLIN-OGDENSBURG MINERALOGICAL SOCIETY, INC. SPRING. 1986 VOLUME 27, NO.l The contents of The Picking Table are licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. F.QM.S. Notes prise a spectacular fluorescent display. For PRESIDENT'S MESSAGE years the Gerstmann Mineral Museum has displayed the collection for the delight and With the melting of the snow, the rocks of education of amateur and professional mineralo- the Buckwheat Dump emerge from their white gists alike. The Franklin Mineral Museum mantle, and the seismic tremors rumble through is most grateful to Arthur and Harriet Mitteldorf the souls of the collector community. Whatever for this most generous donation and to Ewald Spring may mean to the average mortal, to Gerstmann for its accumulation and for his FOMS members it brings a special appeal to sponsorship of the Franklin Mineral Museum dig in the dirt, not to plant, but to explore as the recipient. Transfer of the collection again the crystalline mysteries of Nature. will be effected as soon as suitable space is available to house it. Let us not lose sight of the fact that we are a community, however widespread, dedicated JLB to a great common interest and purpose: the expansion and preservation of knowledge about the world's most remarkable mineral location. ABOUT THE COVER SKETCH Like all great enterprises, this demands the efforts and participation of many. To the Located Sphalerite Occurrences—Franklin Mine extent that we share our knowledge, our time, and our interest with each other and the world, It is suggested that you refer to this hand Franklin lives.
    [Show full text]
  • MINERALS and MINERAL VARIETIES from METAMORPHOSED Mn DEPOSITS of BISTRITA MOUNTAINS, ROMANIA
    Acta Mineralogica-Petrographica, Abstract Series 1, Szeged, 2003 MINERALS AND MINERAL VARIETIES FROM METAMORPHOSED Mn DEPOSITS OF BISTRITA MOUNTAINS, ROMANIA HÎRTOPANU, P.1 & SCOTT, P.2 1 Geological Institute of Romania, Caransebeş 1, RO-78344 Bucharest, Romania. E-mail: [email protected] 2 Camborne School of Mines, Redruth, Cornwall, United Kingdom. The Bistrita Mountains belong to the Crystalline Meso- mation of some amphiboles and some pyroxenes into other zoic Zone of the East Carpathians, which consists of super- phases, there are drastical transformations of pyroxenes into posed Variscan and Alpine Nappes, overthrusted eastwards pyroxenoids (johannsenite into rhodonite), pyroxenoids into over the Flysch Zone. The manganese ore is contained by pyroxenoids (pyroxmangite into rhodonite), pyroxmangite Tulghes Group (Tg2 level) of the Variscan Putna Nappe, into manganogrunerite, garnets into garnets (spessartine- situated over the Pietrosu Bistritei Nappe and supporting the calderite into spessartine, spessartine into anisotropic spes- thrusting of the Rebra Nappe. All these Variscan nappes sartine-andradite-grossular), calderite into pyroxmangite- constitute the Alpine Sub-Bucovinian Nappe localised be- magnetite, etc. are the best evidences of continuous variation tween Alpine Infrabucovinian Nappe in the East and the of formation conditions. Alpine Bucovinian Nappe in the West. The Mn ore have a predominant carbonate rather than The mineralogy of Mn metamorphosed deposits from silicate mineralogical composition, which means a great CO2 Bistrita Mts. includes 328 minerals and mineral varieties. fluid control in the carbonation and dehydration processes They may count among the mineralogically the most com- along the many stages of the whole history of the ore and the plex deposits of the world.
    [Show full text]
  • Kinoshitalite (Ba,K)(Mg,Mn,Al)3Si2al2o10(OH)2
    Kinoshitalite (Ba; K)(Mg; Mn; Al)3Si2Al2O10(OH)2 c 2001 Mineral Data Publishing, version 1.2 ° Crystal Data: Monoclinic. Point Group: 2=m: Forms small scales, < 1 mm. Physical Properties: Cleavage: 001 , perfect. Tenacity: Brittle. Hardness = 2.5{3 D(meas.) = 3.30 D(calc.) = 3.33 f g Optical Properties: Semitransparent. Color: Yellow-brown to colorless; light yellow to colorless in thin section. Luster: Vitreous. Optical Class: Biaxial ({). Pleochroism: X = very light yellow to light yellow; Y = Z = light yellow with brownish tinge. Absorption: Y Z > X. ® = 1.619 ¯ = 1.628{1.633 ° = 1.635 ' 2V(meas.) = 23± Cell Data: Space Group: C2=m: a = 5.345(3) b = 9.250(4) c = 10.256(8) ¯ = 99:99(6)± Z = 2 X-ray Powder Pattern: Noda-Tamagawa mine, Japan. 3.37 (100), 2.52 (55), 2.020 (55), 5.05 (50), 10.1 (45), 1.684 (15), 3.16 (5) Chemistry: (1) (2) (1) (2) SiO2 24.58 23.43 BaO 17.85 27.60 TiO2 0.16 Na2O 0.68 0.11 Al2O3 22.06 19.25 K2O 3.30 0.24 Fe2O3 0.71 1.87 F 0.21 + Mn2O3 3.24 H2O 2.90 FeO 0.04 H2O¡ 0.20 MnO 7.38 2.62 H2O 3.50 MgO 16.60 21.95 O = F 0.09 ¡ 2 CaO 0.05 0.05 Total 99.87 100.62 2+ (1) Noda-Tamagawa mine, Japan; corresponds to (Ba0:58K0:35Na0:11Ca0:01)§=1:05(Mg2:06Mn0:52 3+ 3+ Al0:22Mn0:21Fe0:04Ti0:01)§=3:06Si2:05Al1:94O10[(OH)1:62O0:33F0:06]§=2:01: (2) Netra, India; by electron microprobe, total Fe as Fe2O3; corresponding to (Ba0:93K0:03Na0:02Ca0:01)§=0:99 (Mg2:80Mn0:19Fe0:08)§=3:07Si2:01(Al1:94Fe0:05)§=1:99O10(OH)2: Polymorphism & Series: 1M, 2M1 polytypes.
    [Show full text]
  • Download the Scanned
    American Mineralogist, Volume 70, pages 379-387, 1985 Ma_nganesehumites and leucophoenicitesfrom Franklin and Sterling- Hill' NewJersev: 'i"? andimplications ;ifi':il1,;;lfiil11"r's' Perr J. Dullx Department of Mineral Sciences Smithsonian lnstitution, Washington, D. C. 20560 Abstract The manganesehumites, (alleghanyite, manganhumite, and sonolite),together with some Mn-bearing samplesof the Mg-humites,and the related phasesleucophoenicite and jerry- gibbsite,from the orebodiesat Franklin and SterlingHill, New Jersey,are describedtogether with analytical data. Solid solution betweenhumite and manganhumiteis at least partially continuous. Expected Mn/Mg solid solutions between alleghanyiteand chondrodite, and betweensonolite and clinohumite, are discontinuous; they are interrupted by apparently orderedphases. In all cases,the possibleorderings involve Zn as well as Mn and Mg. There are no Mn end-membersof the manganesehumites at this locality. Manganeseis apparently restricted in leucophoenicite(5.42-6.63 Mn per 7 octahedral cations) and in jerrygibbsite (7.79-8.02Mn per 9 octahedralcations). Calcium is common to both leucophoeniciteand jerrygibbsite,but among the Mn-humites,only sonoliteaccepts appreciable Ca (0.65Ca per 9 octahedralcations). There is a "threshold" level ofzinc in all studiedsamples; this "threshold" levelis a constantfor leucophoenicite1-9.3 Znper 3 Si)and alleghanyite(-O.2Zn per 2 Si). No samplesof leucophoeniciteor jerrygibbsite were found to be Zn-ftee,suggesting either that Zn is required for their stability, or that these two phasesmight not be stable as end-members.Fluorine is present in all the Mn-humites and is proportional to the Mg- content,but is absentin leucophoeniciteand jerrygibbsite. Introduction humite speciesoccur there; the Mg-humites occur in the The magnesiumhumite species(norbergite, chondrodite, host Franklin Marble for the most part, and the Mn- humite, and clinohumite) have been well-studiedand re- humites in the orebodiesthemselves.
    [Show full text]
  • Kumtyubeite Ca5(Sio4)2F2—A New Calcium Mineral of the Humite Group from Northern Caucasus, Kabardino-Balkaria, Russia
    American Mineralogist, Volume 94, pages 1361–1370, 2009 Kumtyubeite Ca5(SiO4)2F2—A new calcium mineral of the humite group from Northern Caucasus, Kabardino-Balkaria, Russia Ir I n a О. Ga l u s k I n a ,1,* BI l j a n a la z I c ,2 Th o m a s ar m B r u s T e r,2 ev G e n y v. Ga l u s k I n ,1 vI k T o r m. Ga z e e v,3 al e k s a n d e r e. za d o v,4 nI k o l a I n. Pe r T s e v,3 lIdIa je ż a k ,5 ro m a n Wr z a l I k ,6 a n d an a T o l y G. Gu r B a n o v 3 1Faculty of Earth Sciences, Department of Geochemistry, Mineralogy and Petrography, University of Silesia, Będzińska 60, 41-200 Sosnowiec, Poland 2Mineralogical Crystallography, Institute of Geological Sciences, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland 3Institute of Geology of Ore Deposits, Geochemistry, Mineralogy and Petrography (IGEM) RAS, Staromonetny 35, 119017 Moscow, Russia 4OOO NPP TEPLOCHIM, Dmitrovskoye av. 71, 127238 Moscow, Russia 5Institute of Geochemistry, Mineralogy and Petrology, University of Warsaw, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland 6Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland aB s T r a c T Kumtyubeite, Ca5(SiO4)2F2—the fluorine analog of reinhardbraunsite with a chondrodite-type structure—is a rock-forming mineral found in skarn carbonate-xenoliths in ignimbrites of the Upper Chegem volcanic structure, Kabardino-Balkaria, Northern Caucasus, Russia.
    [Show full text]
  • Leucophoenicite Mn (Sio4)3(OH)2
    2+ Leucophoenicite Mn7 (SiO4)3(OH)2 c 2001 Mineral Data Publishing, version 1.2 ° Crystal Data: Monoclinic. Point Group: 2=m: Crystals rare, typically slender, prismatic, elongated and striated [010], to 8 mm; in isolated grains or granular massive. Twinning: On k 001 , common, contact or interpenetrant twins, lamellar. f g Physical Properties: Cleavage: 001 , imperfect. Tenacity: Brittle. Hardness = 5.5{6 f g D(meas.) = 3.848 D(calc.) = [4.01] Optical Properties: Transparent to translucent. Color: Brown to light purple-red, raspberry-red, deep pink to light pink; rose-red to colorless in thin section. Luster: Vitreous. Optical Class: Biaxial ({). Pleochroism: Faint; rose-red 001 ; colorless 001 . Orientation: k f g ? f g X 001 cleavage. Dispersion: r > v; slight. ® = 1.751(3) ¯ = 1.771(3) ° = 1.782(3) ? f g 2V(meas.) = 74(5)± Cell Data: Space Group: P 21=a: a = 10.842(19) b = 4.826(6) c = 11.324(9) ¯ = 103:93(9)± Z = [2] X-ray Powder Pattern: Franklin, New Jersey, USA. 1.8063 (10), 2.877 (9), 2.684 (8), 4.36 (5), 3.612 (5), 2.365 (5), 2.620 (4) Chemistry: (1) (2) (3) (1) (2) (3) SiO2 26.36 26.7 26.7 CaO 5.67 2.4 2.8 FeO trace 0.3 0.3 Na2O 0.39 MnO 60.63 62.8 64.7 K2O 0.24 ZnO 3.87 0.0 0.0 H2O 2.64 [2.3] [2.8] MgO 0.21 5.5 2.7 Total 100.01 [100.0] [100.0] (1) Franklin, New Jersey, USA; composite of two analyses, corresponding to (Mn5:89Ca0:70Zn0:32 Na0:04Mg0:03K0:01)§=6:99(Si1:01O4)3(OH)2: (2) Kombat mine, Namibia; by electron microprobe, H2O by di®erence; corresponding to (Mn5:98Mg0:92Ca0:29Fe0:02)§=7:21(SiO4)3(OH)1:72: (3) Valsesia-Valtournanche area, Italy; by electron microprobe, H2O by di®erence; corresponding to (Mn6:16Mg0:45Ca0:34Fe0:03)§=6:98(SiO4)3(OH)2:10: Mineral Group: Leucophoenicite group.
    [Show full text]
  • The Picking Table Volume 8, No. 1
    THE PICKING TABLE FRANKLIN OGDENSBURG MINSHALOGICAL SOCIETY, INC, P. 0. BOJC 146 FRANKLIN, H.J., 07416 VOLUME VIII FEBRUARY 196? NUMBER 1 The contents of The Picking Table are licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. CLUB PROGRAM - SPRING 1967 All meetings will be held at the Hardyston School, intersection of Routes #23 and #517, Franklin, N. J. Pre meeting activities start at 1:00 P.A. Speaker will be announced at 2:30 P.M. Sunday, Field trip, 9=00 A..-I. to Noon - March 19th. Buckwheat Dump, Franklin, N.J. Meeting, 2:30 P.M. Speaker, Paul Desautels Subject - Blood Relatives Among the Minerals. Saturday, Field trip, 9:00 A.M. to Noon - April 15th Buckwheat Dump, Franklin, N.J. Meeting, 2:30 P.M. Speaker - Dr. Paul Moore. Subject - The Mineralogy of Langban, Sweden. Saturday, Field trip, 9:00 A.M. to Noon - Open Cuts, May 20th Sterling Hill Mine, Ogdensburg, H. J. Meeting, 2:30 P.M. Speaker - Dr. Clifford Frondel Subject - Franklin Minerals, New and Old Saturday, Field trio, 9:00 A.M. to Noon - June 17th Farber Quarry, Cork Hill Road, Franklin, ..J, Meeting, 2:30 P.JL Speaker - Robert Metsger Subject - The Geology of Sterling Hill. Special Events April 22/23 1967 Earth Science and Gem Show Mineralogical Society of Pennsylvania, Route 30, Lancaster, Pa. May 6/7th 3rd Annual Mineral and Gem Show Matawan Mineralogical Society, Matawan Regional High School, Matawan, ft. June 29/July 2nd 1967 National Gem and Mineral Show, Eastern Federation, Washington Hilton Hotel, Washington, D.C.
    [Show full text]
  • H Positions in Leucophoenicite, Mn7si3o12(OH)2: a Close Relative of the Hydrous B Phases
    American Mineralogist, Volume 87, pages 154–159, 2002 H positions in leucophoenicite, Mn7Si3O12(OH)2: A close relative of the hydrous B phases MARK D. WELCH,1,* WILLIAM G. MARSHALL,2 NANCY L. ROSS,3 AND KEVIN S. KNIGHT2 1Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, U.K. 2ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, U.K. 3Department of Geological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, U.S.A. ABSTRACT The proton positions in leucophoenicite, ideally Mn7Si3O12(OH)2, have been determined by neu- tron powder diffraction under ambient conditions on a natural sample from Franklin, New Jersey. 2 Refinement in the P21/a space group gave Rp = 2.0% (wRp = 2.1%), χ = 4.04 for 110 refined param- eters. The two non-equivalent protons form a pair of hydroxyl groups and make hydrogen bonds to the same O7 atom of the Si1 tetrahedron at distances of 1.99(1) and 2.09(1) Å. The H····H distance in leucophoenicite is 2.16(1) Å, which is more than twice the Van der Waal’s radius of H (>2 Å) and so no proton positional disorder is expected in leucophoenicite. A comparison of the H environments is made between leucophoenicite and Phase B, Superhydrous B, and Phase A. INTRODUCTION tions of cation octahedra in leucophoenicite are like those of Understanding the behavior of hydrogenous components of the hydrous sheet of Phase B. The leucophoenicite structure mantle phases is important for interpreting the crystal chemis- consists of two polyhedral sheets which, in the centrosymmet- try and physical properties (elasticity and rheology) of these ric structure (see below), are related by inversion centers.
    [Show full text]