DOCSLIB.ORG

NEW DATA on BETALOMONOSOVITE Boris Ye

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
NEW DATA on BETALOMONOSOVITE Boris Ye New Data on Minerals. 2014. Vol. 49 23 NEW DATA ON BETALOMONOSOVITE Boris Ye. Borutzky Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, [email protected] Olga A. Ageeva, Oksana V. Karimova, Pavel M. Kartashov Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM), Russian Academy of Sciences, Moscow, [email protected] Olga V. Yakubovich Moscow State University, Geological Faculty, Moscow, [email protected] The new data on compositional variations, refined crystal structure, thermal properties, and formation conditions of betalomonosovite are discussed. The results obtained assert that betalomonosovite differs from lomonosovite with which the former is identified. It has individual chemical and structural features, and distinct geological and genetic setting, and should be rehabilitated as individual mineral species. 3 tables, 6 figures, 58 references. Keywords: lomonosovite, betalomonosovite, murmanite, crystal structure, Khibiny massif, melteigite-urtite, juvite, rischorrite, hyperagpaitic minerals assemblage. The aim of this study is comparison of new (1950) was studied in detail by Es'ko va (1976), data on betalomonosovite, Na4Ti4(Si2O7)2 (O,F)4 Vlasov et al. (1959), and Semenov et al. (1961). · Na2H4(PO4)2 results of investigation of lomo- In contrast to murmanite, this mineral con- · nosovite Na4Ti4 (Si2O7)2(O,F)4 Na6(PO4)2, with tained P and was anhydrous Na4Ti4Si4(O,F)18 · which betalomonosovite is identified accor- 2Na3PO4. In Khibiny, Dorfman (1962) found ding to recommendation of the Commission lomonosovite for the first time in the district of on new Minerals and Mineral Names Interna - apatite deposits. tional Mineralogical Association in 1988, and Betalomonosovite discussed in this article, · those of murmanite Na4Ti4(Si2O7)2O4 (H2O)4 was found and described as mineral no. 2 in as final product of supergene alteration of 1938 by Gerasimovsky, but its detailed exami- lomonosovite, with which betalomonosovite is nation was started in 1960s (Gerasimovsky unreasonably attributed to the same solid so - and Kazakova, 1962), when Semenov et al. lution series as intermediate species of similar (1961) found more representative material in alteration. We do not discuss other lomonoso- the same district. In Khibiny, betalomonoso- vite group minerals: vuonnemite and episto- vite was found at the Rasvumchorr deposit in lite, Nb analogs of lomonosovite and murma - 1958 (Sokolova, 1961; Sokolova et al., 19712). nite, respectively, and quadruphite, sobole- In contrast to the previous findings, this mi - vite, and polyphite, Ca-and Mn-rich analogs neral contained P and significant amount of of lomonosovite, although they are end-mem- water; betalomonosovite1 was described by · bers of probable solid solution series for iso- the following formulae: Na4Ti4 Si4(O,F)18 (Na,H)6 · · morphic admixtures typical of betalomonoso- (PO4)2, Na4Ti4Si4(O,F)18 Na2HPO4 NaH2PO4 or · vite and could be formed in similar geological Na4Ti4Si4(O,F)18 Na3[PO4(OH)PO2(OH)2]. To environment. date, it is reasonably chemical, structural, and geological characterized in the context of its Discovery nature, abundance in alkaline rocks of ag - paitic nepheline syenite massifs and forma- In 1890, Wilhelm Ramsay described new tion conditions to regard it as individual mi - hydrous niobo-titano-silicate, mineral no. 3 neral species. Nevertheless, it was missinlcu - (Ramsay, 1890) from the Lovozero tundras. In ded by CNMMN IMA into the list of dis cre - 1923, members of the Fersman expedition dited minerals (Nickel and Mandarino, 1988) found this mineral in the same district and that hampers its further detailed study. This described it as violophillite. After detailed forced us to carry out the new measurement of exa mination, Gutkova (1930) renamed it to the chemical composition and crystal struc- mur manite with the refined composition Na4Ti4 ture of betalomonosovite, as well as, its gene - · Si4O18 4H2O (Minerals…, 1937). Lomo no so - tic relationship with lomonosovite and mur- vite, anhydrous analog of murmanite, discov- manite to additionally argue the reinstate- ered from the same massif by Gerasi movsky ment of this term. 1 – Many researchers assumed that this name is poor because betalomonosovite is not structural modification of lomonosovite, i.e., b-species (b-lomonosovite), otherwise, term a-lomonosovite should be introduced. 24 New Data on Minerals. 2014. Vol. 49 Geological setting and manite were established to be common in the formation conditions of murmanite, same rocks: leucocratic varieties of rocks from lomonosovite, and betalomonosovite the differentiated complex (III) with greater amount in foyaite than urtite and lujavrite; Murmanite. Murmanite is abundant ac - leucocratic lujavrite of the lujavrite complex cessory mineral of some peralkaline leuco- (IV), sodalite varieties of poikilitic nepheline- cratic rocks and hosted pegmatites in the sodalite syenite (II), and pegmatites hosted in Lovozero tundras. It was found at Mts. Pun - these rocks. Fresh lomonosovite was observed karuaiv, Suoluaiv, Ninchurt, and Mannepahk; in drill core below 250–300 m, whereas at the cirques Raslak, Sengischorr, and Angvun - depth of 100–200 m below surface it was fol- dasschorr; and in the Chinglusuai, Motchi - lowed by the yellow and violet-pink variety; at suai, and Muruai valleys (Minerals…, 1937). the surface murmanite is pink. Relics of al - According to Bussen and Sakharov (1972) re - tered lomonosovite retaining morphology and ferring to Gutkova (1930) and Es'kova (1959), optical orientation were observed everywhere it occurs as lenticular clusters within layers in murmanite. In other words, it was proved by I-1 and II-2 hosted in juvite, foyaite, and urtite direct methods that murmanite is secondary of the differentiated lujavrite-foyaite-urtite after lomonosovite. complex (complex III); this mineral is com- Experiments in Na and P desalination from mon in leucocratic varieties of lujavrite comp - lomonosovite using hot and cold distillated lex (complex IV) where it forms phenocrysts water performed by Gerasimovsky and Bor - in near-contact porphyry lujavrite (tinguaite) neman-Starynkevich (Borneman-Staryn ke vich, and always occurs in porphyry murmanite 1946) and specified by Zabavnikova (1967) and lujavrite (complex V). Through all rocks, mur- Sokolova et al. (1973) using chemical and ther- manite is observed with lomonosovite typical- mal analysis, and X-ray diffraction supported ly associated with agpaitic minerals: K,Na the probable formation of murmanite by this feldspar, nepheline, sodalite, aegirine, lam- manner. It was established that pink-lilac color prophyllite, and eudialyte. Pegmatite with of murmanite with characteristic absorption murmanite and lomonosovite were also hos - bands at 12650, 18850, and 20600 cm 1 is ted in porphyritic and poikilitic nepheline- caused by Mn3+ (Platonov, 1976) that is also sodalite syenite and tavite (complex II) (Mine - consistent with oxidative environment in mur- rals…, 1937). manite formation. In contrast to Lovozero, in Khibiny, negli- By the further investigations of Kho mya - gible amount of altered murmanite was found kov (1990), it has become clear that in addi- only on the surface (Gutkova, 1930; Kuplet - tion to the lomonosovite – murmanite pair, sky, 1930; 1932; Minerals…, 1937; Dorfman, there are some primary minerals, which are 1962; Tikhonenkov, 1963). Fresh murmanite transformed to the secondary species due to was identified in mines at the Rasvumchorr, Na desalination and hydration as a result of Kukisvumchorr, and Yukspor apatite deposits sharply evolved alkalinity of mineral-forming in pegmatites hosted in coarse-grained urtite medium; these minerals common close to sur- and rischorrite hosting ore sequence, as well face as rule are: vuonnemite, Na11TiNb2Si4 · as, in melteigite of the upper contact zone, P2O25F ® epistolite, Na5TiNb2Si4O17F 4H2O, where it replaces lomonosovite lamellae (So - parakeldyshite, Na2ZrSi2O7 ® keldyshite, ko lova, 1965; Sokolova et al., 1973). The fres - Na3HZr2(Si2O7)2, zirsinalite, Na6CaZrSi6O18 ® hest pinkish white fine-flake murmanite with lovozerite, Na3CaZrSi6O15(OH)3, kazakovite, nacreous luster that could be assumed as Na6MnTiSi6O18 ® tisinalite, Na3MnTiSi6O15 newly formed phase was found as thin (up to (OH)3. They are regarded as individual mine - 1 mm in thickness) stringer cutting massive ral species or varieties with prefix "hydro", for urtite at the Rasvumchorr deposit (Mine ra - example, delhayelite, K3Na2Ca2Si7AlO19(F,Cl)2 · logy…, 1978). ® hydrodelhayelite, KCaSi7AlO17(OH)2 6H2O. Murmanite (associated with lomonosovite) Cogenetic minerals typically associated was found in the same situation from agpaitic with lomonosovite and murmanite are the sa - rocks of the Ilimaussaq massif, South Gre - me: microcline, nepheline, arfvedsonite, and enland (Karup-Mшller, 1983; 1986). sodalite. Lomonosovite inclusions are obser- Lomonosovite. Es'kova (1959) studied in ved in albite, sodalite, cancrinite, ussingite, detail the geological setting of lomonosovite and natrolite; however these inclusions are in the Lovozero massif taking into account the transformed to murmanite only in natrolite. data of Gerasimovsky (1950) and Borneman- This not contradicts the pseudomorphous ori- Starynkevich (1946). Lomonosovite and mur- gin of murmanite and it is clear that meteoric New data on betalomonosovite 25 water or low-hydrothermal fluid is required to et al., 19712). Sufficiently large well-shaped form it.
Load more

Recommended publications
  • Mineral of the Month Club January 2016
    Mineral of the Month Club January 2016 HALITE This month our featured mineral is halite, or common salt, from Searles Lake, California. Our write-up explains halite’s mineralogy and many uses, and how its high solubility accounts for its occurrence as an evaporite mineral and its distinctive taste. In the special section of our write-up we visit a European salt mine that is a world-class cultural and heritage site. OVERVIEW PHYSICAL PROPERTIES Chemistry: NaCl Sodium Chloride, often containing some potassium Class: Halides Group: Halite Crystal System: Isometric (Cubic) Crystal Habits: Cubic, rarely octahedral; usually occurs as masses of interlocking cubic crystals with corners sometimes truncated into small, octahedral faces; skeletal forms and receded hopper-type faces are common. Also occurs in massive, fibrous, granular, compact, stalactitic, and incrustation forms. Color: Most often light gray, colorless or white; also pale shades of yellow, red, pink, blue, and purple; blue and purple hues are sometimes intense. Luster: Vitreous Transparency: Transparent to translucent Streak: White Cleavage: Perfect in three directions Fracture/Tenacity: Conchoidal; brittle. Hardness: 2.0 Specific Gravity: 2.17 Luminescence: Often fluorescent Refractive Index: 1.544 Distinctive Features and Tests: Best field indicators are distinctive “table-salt” taste, cubic crystal form, perfect three-dimensional cleavage, and occurrence in evaporite- type deposits. Halite can be confused with sylvite [potassium chloride, KCl], which is similar in crystal form, but has a more astringent taste. Dana Classification Number: 9.1.1.1 NAME: The word “halite,” pronounced HAY-lite (rhymes with “daylight”), is derived from the Greek hals, meaning “salt,” and “lithos,” or stone.
    [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]
  • Anorogenic Alkaline Granites from Northeastern Brazil: Major, Trace, and Rare Earth Elements in Magmatic and Metamorphic Biotite and Na-Ma®C Mineralsq
    Journal of Asian Earth Sciences 19 (2001) 375±397 www.elsevier.nl/locate/jseaes Anorogenic alkaline granites from northeastern Brazil: major, trace, and rare earth elements in magmatic and metamorphic biotite and Na-ma®c mineralsq J. Pla Cida,*, L.V.S. Nardia, H. ConceicËaÄob, B. Boninc aCurso de PoÂs-GraduacËaÄo em in GeocieÃncias UFRGS. Campus da Agronomia-Inst. de Geoc., Av. Bento GoncËalves, 9500, 91509-900 CEP RS Brazil bCPGG-PPPG/UFBA. Rua Caetano Moura, 123, Instituto de GeocieÃncias-UFBA, CEP- 40210-350, Salvador-BA Brazil cDepartement des Sciences de la Terre, Laboratoire de PeÂtrographie et Volcanologie-Universite Paris-Sud. Centre d'Orsay, Bat. 504, F-91504, Paris, France Accepted 29 August 2000 Abstract The anorogenic, alkaline silica-oversaturated Serra do Meio suite is located within the Riacho do Pontal fold belt, northeast Brazil. This suite, assumed to be Paleoproterozoic in age, encompasses metaluminous and peralkaline granites which have been deformed during the Neoproterozoic collisional event. Preserved late-magmatic to subsolidus amphiboles belong to the riebeckite±arfvedsonite and riebeckite± winchite solid solutions. Riebeckite±winchite is frequently rimmed by Ti±aegirine. Ti-aegirine cores are strongly enriched in Nb, Y, Hf, and REE, which signi®cantly decrease in concentrations towards the rims. REE patterns of Ti-aegirine are strikingly similar to Ti-pyroxenes from the IlõÂmaussaq peralkaline intrusion. Recrystallisation of mineral assemblages was associated with deformation although some original grains are still preserved. Magmatic annite was converted into magnetite and biotite with lower Fe/(Fe 1 Mg) ratios. Recrystallised amphibole is pure riebeckite. Magmatic Ti±Na-bearing pyroxene was converted to low-Ti aegirine 1 titanite ^ astrophyllite/aenigmatite.
    [Show full text]
  • Petrology of Nepheline Syenite Pegmatites in the Oslo Rift, Norway: Zr and Ti Mineral Assemblages in Miaskitic and Agpaitic Pegmatites in the Larvik Plutonic Complex
    MINERALOGIA, 44, No 3-4: 61-98, (2013) DOI: 10.2478/mipo-2013-0007 www.Mineralogia.pl MINERALOGICAL SOCIETY OF POLAND POLSKIE TOWARZYSTWO MINERALOGICZNE __________________________________________________________________________________________________________________________ Original paper Petrology of nepheline syenite pegmatites in the Oslo Rift, Norway: Zr and Ti mineral assemblages in miaskitic and agpaitic pegmatites in the Larvik Plutonic Complex Tom ANDERSEN1*, Muriel ERAMBERT1, Alf Olav LARSEN2, Rune S. SELBEKK3 1 Department of Geosciences, University of Oslo, PO Box 1047 Blindern, N-0316 Oslo Norway; e-mail: [email protected] 2 Statoil ASA, Hydroveien 67, N-3908 Porsgrunn, Norway 3 Natural History Museum, University of Oslo, Sars gate 1, N-0562 Oslo, Norway * Corresponding author Received: December, 2010 Received in revised form: May 15, 2012 Accepted: June 1, 2012 Available online: November 5, 2012 Abstract. Agpaitic nepheline syenites have complex, Na-Ca-Zr-Ti minerals as the main hosts for zirconium and titanium, rather than zircon and titanite, which are characteristic for miaskitic rocks. The transition from a miaskitic to an agpaitic crystallization regime in silica-undersaturated magma has traditionally been related to increasing peralkalinity of the magma, but halogen and water contents are also important parameters. The Larvik Plutonic Complex (LPC) in the Permian Oslo Rift, Norway consists of intrusions of hypersolvus monzonite (larvikite), nepheline monzonite (lardalite) and nepheline syenite. Pegmatites ranging in composition from miaskitic syenite with or without nepheline to mildly agpaitic nepheline syenite are the latest products of magmatic differentiation in the complex. The pegmatites can be grouped in (at least) four distinct suites from their magmatic Ti and Zr silicate mineral assemblages.
    [Show full text]
  • Titanite Ores of the Khibiny Apatite-Nepheline- Deposits: Selective Mining, Processing and Application for Titanosilicate Synthesis
    minerals Article Titanite Ores of the Khibiny Apatite-Nepheline- Deposits: Selective Mining, Processing and Application for Titanosilicate Synthesis Lidia G. Gerasimova 1,2, Anatoly I. Nikolaev 1,2,*, Marina V. Maslova 1,2, Ekaterina S. Shchukina 1,2, Gleb O. Samburov 2, Victor N. Yakovenchuk 1 and Gregory Yu. Ivanyuk 1 1 Nanomaterials Research Centre of Kola Science Centre, Russian Academy of Sciences, 14 Fersman Street, Apatity 184209, Russia; [email protected] (L.G.G.); [email protected] (M.V.M.); [email protected] (E.S.S.); [email protected] (V.N.Y.); [email protected] (G.Y.I.) 2 Tananaev Institute of Chemistry of Kola Science Centre, Russian Academy of Sciences, 26a Fersman Street, Apatity 184209, Russia; [email protected] * Correspondence: [email protected]; Tel.: +7-815-557-9231 Received: 4 September 2018; Accepted: 10 October 2018; Published: 12 October 2018 Abstract: Geological setting and mineral composition of (apatite)-nepheline-titanite ore from the Khibiny massif enable selective mining of titanite ore, and its processing with sulfuric-acid method, without preliminary concentration in flotation cells. In this process flow diagram, titanite losses are reduced by an order of magnitude in comparison with a conventional flotation technology. Further, dissolution of titanite in concentrated sulfuric acid produces titanyl sulfate, which, in turn, is a precursor for titanosilicate synthesis. In particular, synthetic analogues of the ivanyukite group minerals, SIV, was synthesized with hydrothermal method from the composition based on titanyl-sulfate, and assayed as a selective cation-exchanger for Cs and Sr.
    [Show full text]
  • Chemical Composition and Petrogenetic Implications of Eudialyte-Group Mineral in the Peralkaline Lovozero Complex, Kola Peninsula, Russia
    minerals Article Chemical Composition and Petrogenetic Implications of Eudialyte-Group Mineral in the Peralkaline Lovozero Complex, Kola Peninsula, Russia Lia Kogarko 1,* and Troels F. D. Nielsen 2 1 Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia 2 Geological Survey of Denmark and Greenland, 1350 Copenhagen, Denmark; [email protected] * Correspondence: [email protected] Received: 23 September 2020; Accepted: 16 November 2020; Published: 20 November 2020 Abstract: Lovozero complex, the world’s largest layered peralkaline intrusive complex hosts gigantic deposits of Zr-, Hf-, Nb-, LREE-, and HREE-rich Eudialyte Group of Mineral (EGM). The petrographic relations of EGM change with time and advancing crystallization up from Phase II (differentiated complex) to Phase III (eudialyte complex). EGM is anhedral interstitial in all of Phase II which indicates that EGM nucleated late relative to the main rock-forming and liquidus minerals of Phase II. Saturation in remaining bulk melt with components needed for nucleation of EGM was reached after the crystallization about 85 vol. % of the intrusion. Early euhedral and idiomorphic EGM of Phase III crystalized in a large convective volume of melt together with other liquidus minerals and was affected by layering processes and formation of EGM ore. Consequently, a prerequisite for the formation of the ore deposit is saturation of the alkaline bulk magma with EGM. It follows that the potential for EGM ores in Lovozero is restricted to the parts of the complex that hosts cumulus EGM. Phase II with only anhedral and interstitial EGM is not promising for this type of ore.
    [Show full text]
  • The Emplacement and Crystallization of the U–Th–REE-Rich Agpaitic and Hyperagpaitic Lujavrites at Kvanefjeld, Ilímaussaq Al
    The emplacement and crystallization of the U–Th–REE- rich agpaitic and hyperagpaitic lujavrites at Kvanefjeld, Ilímaussaq alkaline complex, South Greenland* HENNING SØRENSEN, JOHN C. BAILEY & JOHN ROSE-HANSEN Sørensen, H., Bailey, J.C. & Rose-Hansen, J. 2011. The emplacement and crystallization of the U– Th–REE-rich agpaitic and hyperagpaitic lujavrites at Kvanefjeld, Ilímaussaq alkaline complex, South Greenland © 2011 by Bulletin of the Geological Society of Denmark, Vol. 59, pp. 69–92. ISSN 0011–6297. (www.2dgf.dk/publikationer/bulletin) https://doi.org/10.37570/bgsd-2011-59-08 The U–Th–REE deposit located at the Kvanefjeld plateau in the north-west corner of the Ilímaussaq alkaline complex, South Greenland, consists of lujavrites which are melanocratic agpaitic nepheline syenites. The fine-grained lujavrites of the Kvanefjeld plateau can be divided into a northern and a southern part with an intermediate zone between them. The northern part is situated along the north contact of the Ilímaussaq complex and continues east of the Kvanefjeld plateau as a lujavrite belt along the contact. This part has relatively ‘low’ contents of U, Th, and REE, and hyperagpaitic mineralogy is restricted to its highest-lying parts. The fine-grained lujavrites of the intermediate and southern part of the Kvanefjeld plateau occur between and below huge masses of country Received 14 September 2009 rocks which we show are practically in situ remnants of the roof of the lujavrite magma chamber. Accepted in revised form 1 September 2011 These lujavrites have high contents of U, Th, and REE, and hyperagpaitic varieties with naujakasite, Published online steenstrupine and villiaumite are widespread.
    [Show full text]
  • Thirty-Fourth List of New Mineral Names
    MINERALOGICAL MAGAZINE, DECEMBER 1986, VOL. 50, PP. 741-61 Thirty-fourth list of new mineral names E. E. FEJER Department of Mineralogy, British Museum (Natural History), Cromwell Road, London SW7 5BD THE present list contains 181 entries. Of these 148 are Alacranite. V. I. Popova, V. A. Popov, A. Clark, valid species, most of which have been approved by the V. O. Polyakov, and S. E. Borisovskii, 1986. Zap. IMA Commission on New Minerals and Mineral Names, 115, 360. First found at Alacran, Pampa Larga, 17 are misspellings or erroneous transliterations, 9 are Chile by A. H. Clark in 1970 (rejected by IMA names published without IMA approval, 4 are variety because of insufficient data), then in 1980 at the names, 2 are spelling corrections, and one is a name applied to gem material. As in previous lists, contractions caldera of Uzon volcano, Kamchatka, USSR, as are used for the names of frequently cited journals and yellowish orange equant crystals up to 0.5 ram, other publications are abbreviated in italic. sometimes flattened on {100} with {100}, {111}, {ill}, and {110} faces, adamantine to greasy Abhurite. J. J. Matzko, H. T. Evans Jr., M. E. Mrose, lustre, poor {100} cleavage, brittle, H 1 Mono- and P. Aruscavage, 1985. C.M. 23, 233. At a clinic, P2/c, a 9.89(2), b 9.73(2), c 9.13(1) A, depth c.35 m, in an arm of the Red Sea, known as fl 101.84(5) ~ Z = 2; Dobs. 3.43(5), D~alr 3.43; Sharm Abhur, c.30 km north of Jiddah, Saudi reflectances and microhardness given.
    [Show full text]
  • Yuksporite (K; Ba)(Na; Sr)Ca2(Si; Ti)4O11(F; OH) ² H2O C 2001 Mineral Data Publishing, Version 1.2 ° Crystal Data: Orthorhombic
    Yuksporite (K; Ba)(Na; Sr)Ca2(Si; Ti)4O11(F; OH) ² H2O c 2001 Mineral Data Publishing, version 1.2 ° Crystal Data: Orthorhombic. Point Group: n.d. Fibrous, scaly, or lamellar; in irregular aggregates, to 10 cm. Physical Properties: Hardness = 5 D(meas.) = 3.05(3) D(calc.) = [2.98] Optical Properties: Semitransparent. Color: Rose-red to straw-yellow. Optical Class: Biaxial (+). Pleochroism: Marked; X = pale rose-yellow; Y = Z = rose-yellow. ® = 1.644(2) ¯ = n.d. ° = 1.660(2) 2V(meas.) = 46±{76± Cell Data: Space Group: n.d. a = 24.869(8) b = 16.756(6) c = 7.057(3) Z = 10 X-ray Powder Pattern: Khibiny massif, Russia. 2.778 (10), 3.00 (9), 1.786 (9), 3.10 (8), 3.05 (8), 1.888 (7), 2.92 (6) Chemistry: (1) (2) (1) (2) SiO2 40.92 38.40 BaO 8.60 TiO2 11.00 Na2O 7.94 3.84 Al2O3 0.07 K2O 12.57 6.15 Fe2O3 9.10 0.75 F 3.05 MnO 0.91 0.29 Cl 0.80 + MgO 0.42 H2O 2.20 CaO 20.56 18.90 H2O 8.52 SrO 5.87 O = (F; Cl) 1.46 ¡ 2 Total 100.94 [98.46] (1) Khibiny massif, Russia. (2) Murun massif, Russia; original total given as 99.07%, 3+ corresponds to (K0:70Ba0:30)§=1:00(Na0:66Sr0:30)§=0:96(Ca1:80Ti0:19Fe0:06Mn0:02)§=2:07 (Si3:42Ti0:57Al0:01)§=4:00O11[F0:86Cl0:12(OH)0:02]§=1:00 ² 0:6H2O: Occurrence: In veins in nepheline syenite in a di®erentiated alkalic massif (Khibiny massif, Russia).
    [Show full text]
  • New Minerals Approved Bythe Ima Commission on New
    NEW MINERALS APPROVED BY THE IMA COMMISSION ON NEW MINERALS AND MINERAL NAMES ALLABOGDANITE, (Fe,Ni)l Allabogdanite, a mineral dimorphous with barringerite, was discovered in the Onello iron meteorite (Ni-rich ataxite) found in 1997 in the alluvium of the Bol'shoy Dolguchan River, a tributary of the Onello River, Aldan River basin, South Yakutia (Republic of Sakha- Yakutia), Russia. The mineral occurs as light straw-yellow, with strong metallic luster, lamellar crystals up to 0.0 I x 0.1 x 0.4 rnrn, typically twinned, in plessite. Associated minerals are nickel phosphide, schreibersite, awaruite and graphite (Britvin e.a., 2002b). Name: in honour of Alia Nikolaevna BOG DAN OVA (1947-2004), Russian crys- tallographer, for her contribution to the study of new minerals; Geological Institute of Kola Science Center of Russian Academy of Sciences, Apatity. fMA No.: 2000-038. TS: PU 1/18632. ALLOCHALCOSELITE, Cu+Cu~+PbOZ(Se03)P5 Allochalcoselite was found in the fumarole products of the Second cinder cone, Northern Breakthrought of the Tolbachik Main Fracture Eruption (1975-1976), Tolbachik Volcano, Kamchatka, Russia. It occurs as transparent dark brown pris- matic crystals up to 0.1 mm long. Associated minerals are cotunnite, sofiite, ilin- skite, georgbokiite and burn site (Vergasova e.a., 2005). Name: for the chemical composition: presence of selenium and different oxidation states of copper, from the Greek aA.Ao~(different) and xaAxo~ (copper). fMA No.: 2004-025. TS: no reliable information. ALSAKHAROVITE-Zn, NaSrKZn(Ti,Nb)JSi401ZJz(0,OH)4·7HzO photo 1 Labuntsovite group Alsakharovite-Zn was discovered in the Pegmatite #45, Lepkhe-Nel'm MI.
    [Show full text]
  • L'leve~Th List of New Mineral Na~Es. ~
    556 L'leve~th list of new mineral na~es. ~ By L. J. SPENCER, M.A., Sc.D., F.R.S. Keeper of Minerals ia the British Museum (Natural History). [Communicated June 12~ 1928.] Ajkaite. (L. Zeehmeister, Math. Termdszettud. ~:rtesitS, Badapest, 1926, vol. 43, p. 332 (ajkait); L. Zechmeister and V. Vrab~ly, Per. Deutsch. Chem. Gesell., 1926, vol. 59, Abt. B, p. 1426). The same as ajkite (Bull. Soc. Min. France, 1878, vol. 1, p. 126 ; abstract from... ?). A fossil resin containing 1-5 ~ sulphur and no succinic acid, from Ajka, com. Veszpr~m, Hungary. [M.A. 3-362.] Albiclase. A. N. Winchell, 1925. Journ. Geol. Chicago, vol. 83, p. 726 ; Elements of optical mineralogy, 2nd edit., 1927, pt. 2, p. 319. P. Niggli, Lehrbuch Min., 1926, vol. 2, p. 536 (Albiklas). A contrac- tion of albite-oligoclase for felspars of the plagioclase series ranging in composition from Ab~Anlo to AbsoAn~o. Allite. tL Harrassowitz, 1926. Laterit, Material und Versuch erdgesehichtlicher Auswertung, Berlin 1926, p. 255 (Allit, plur. Allite). A rock-name to include both bauxite and laterite. Later (Metall und Erz, Halle, ]927, vol. 24, p. 589) bauxite with A1208. H~O is distinguished as monohydrallite (Monohydrallit) and laterite with Al~0s.3H20 as trihydrallite (Trihydrallit). These, although suggestive of mineral- names (and given so i~ error in Chem. Zentr., 1926, vol. 1, p. 671), are proposed as rock-names ; from aluminium and M~o~. Similarly, siallites (1926, p. 252, Siallit, from Si, A1, M0o~), to include kaolinite and allo- phanite, are rocks composed of the aluminium silicates kaolin and allophane.
    [Show full text]
  • Mineralogicai, Radiographic and Uranium Leaching Studies on the Uranium Ore from Kvanefjeld, Ilimaussaq Complex, South Greenland
    T><2too/t6' Risø-R-416 Mineralogicai, Radiographic and Uranium Leaching Studies on the Uranium Ore from Kvanefjeld, Ilimaussaq Complex, South Greenland Milota Makovicky, Emil Makovicky, Bjarne Leth Nielsen, Svend Karup-Møller, and Emil Sørensen Risø National Laboratory, DK-4000 Roskilde, Denmark June 1980 RISØ-R-416 MINERALOGICAL, RADIOGRAPHIC AND URANIUM LEACHING STUDIES ON THE URANIUM ORE FROM KVANEFJELD, ILIMAUSSAQ. COMPLEX, 'SOUTH GREENLAND Milota Makovickyl , Emil Makovicky2, Bjarne Leth Nielsen-! , Sven Karuo-Møller^ and Emil Sørensen^ Abstract. 102 samples of low-grade uranium ore from 70 drill holes at Kvanefjeld, Ilimaussaq alkaline intrusion, South Green­ land were studied by means of autoradiography, fission-track investigations, microscopy, microprobe analyses and uranium- leaching experiments. The principal U-Th bearing mineral, steen- strupine, and several less common uranium minerals are dis­ seminated in lujavrite 'nepheline syenite) and altered volcanic rocks. Stenstrupine has a/erage composition Na6.7HxCai.n e Al (REE+Y)5.8(Th,l')o.5 ( ""1 . 6*" 1 . S^Q. 3^0. l 0. 2 ) Sii2036 (P4.3Si-) ,7 )024 (F,OH). nH20; n and x are variable. It either is of magmatic origin (type A) or connected with metasomatic processes (type B), or occurs in late veins (Type C). Preponder­ ance of grains are metamict (usually 2000-5000 ppm U3O8) or al­ tered (usually above 5000 ppm U3O8), sometimes zoned with both (continue on next page) June 1980 Pisø National Laboratory, DK-4000 Roskilde, Denmark components present. Occasionally they are extremely altered with U content falling to 500-5000 ppm U3O8 and local accumulations of high-U minerals formed.
    [Show full text]