Bulletin Mineralogie Petrologie

Jirásek Jakub, Matýsek Dalibor, Škoda Radek, Skupien Petr

Volume 24, issue 1 (2016), pages 80-94

triplite, leucophosphite, perloffite, rockbridgeite, frondelite, bermanite, metauranocircite, hollandite, cryptomelane, phosphates, mineralogy

Article presents detailed research focused on the new finds of phosphates and associated minerals from the Vysoký Kámen feldspar deposit near Krásno, Slavkovský les area, Czech Republic. It presents an erosional relict of topaz -albite granitic elevation (stock). The main granitic facies were described by various authors as aplogranites, albitites, and alkali feldspar syenites. Magmatic rocks show large scale metasomatic albitization, K-feldspatization, and locally also greisenization. Phosphate accumulations with prevailing triplite are connected to pegmatitoid, possibly greisenized veins. Triplite grains are surrounded by alteration rims of fluorapatite. Large number of phosphates (i.e., leucophosphite, perloffite, frondelite, rockbridgeite, bermanite and possibly also its Fe³⁺-analogue) are products of triplite alteration. They form veinlets along fissures or grains up to 100 μm, accompanied by fluorite, quartz, and possible manganese oxides. Supergene fissure mineralization with metauranocircite-I, cryptomelane, hollandite, dickite, and baryte present distinct type of mineralization, with no connection to triplite. Metauranocircite-I structure is not very stable and showed continuous transition to metauranocircite-II during the PXRD analysis.

Abstract (PDF) - 175.32KB
Fulltext (PDF) - 7.20MB

Anthony J. W., Bideaux R. A., Bladh K. W., Nichols M. C. (2000) Handbook of Mineralogy, Volume IV Arsenates, Phosphates, Vanadates. 1-680, Mineralogical Society of America, Chantilly, Virginia.

Barinova A. V., Rastsvetaeva R. K., Sidorenko G. A., Chukanov N. V., Pushcharovskii D. Y., Pasero M., Merlino S. (2003) Crystal structure of metauranocircite Ba(UO₂)₂(PO₄)₂ . 6H₂O. Dokl. Akad. Nauk 389, 203-206.

Beran P. (1999) Nerosty cíno-wolframových ložisek Slavkovského lesa. 1-287, Okresní muzeum a knihovna Sokolov, Sokolov.

Beran P., Sejkora J. (2006) The Krásno Sn-W ore district near Horní Slavkov: mining history, geological and mineralogical characteristics. J. Czech Geol. Soc. 51, 1-2, 3-42.

Biagioni C., Capalbo C., Pasero M. (2013) Nomenclature tunings in the hollandite supergroup. Eur. J. Mineral. 25, 85-90.

Byström A., Byström A. M. (1950) The crystal structure of hollandite, the related manganese oxide minerals, and α-MnO₂. Acta Crystallogr. 3, 146-154.

Dolníček Z., René M. (2012) Doklad aktivity nízkoteplotních Ca-Na-Cl solanek ve feldspatitizovaných granitech živcového ložiska Krásno (masiv Krudum). Geol. výzk. Mor. Slez. 19, 1-2, 137-140.

Elliott P., Willis A. C. (2011) The crystal structure of perloffite. Mineral. Mag. 75(2), 317-325.

Fiala F., Pácal Z. (1968) Aplogranit albitowy z Krasna na tle surowców skaleniowych Czechosłowacji. Biul. Inst. geol. 223, 119-154.

Frost R. L., Xi Y., Scholz R., Belotti F. M. (2013) Vibrational spectroscopic characterization of the phosphate mineral bermanite. Spectrochim. Acta A 105, 359-36.

Frost R. L., Xi Y., Scholz R., Belotti F. M., Beganovic M. (2013) SEM-EDX, Raman and infrared spectroscopic characterization of the phosphate mineral frondelite (Mn²⁺)(Fe³⁺)₄ (PO₄)₃(OH)₅. Spectrochim. Acta A 110, 7-13.

Hurlbut C. S., Aristarain, L. F. (1968) Bermanite and its occurrence in Cordoba, Argentina. Am. Mineral. 53, 1799-1814.

Cháb J., Breiter K. (2008) Variské a raně postvariské intruze. In: Cháb J. (ed.): Stručná geologie základu Českého masivu a jeho karbonského a permského pokryvu, 175-200. Vydavatelství České geologické služby, Praha.

Cháb J., Breiter K., Fatka O., Hladil J., Kalvoda J., Šimůnek Z., Štorch P., Vašíček Z., Zajíc J., Zapletal J. (2008) Stručná geologie základu Českého masivu a jeho karbonského a permského pokryvu. 1-284, Vydavatelství České geologické služby, Praha.

ICDD (2011). PDF-2 Release 2011 (Database). International Centre for Diffraction Data, Newtown Square, PA, USA.

Jacobsen S. D., Smyth J. R., Swope R. J., Downs R. T. (1998) Rigid-body character of the SO₄ groups in celestite, anglesite and barite. Can. Mineral. 36, 1053-1060.

Jambor J. L., Burke E. A. J., Grew E. S., Puziewicz J. (1993) New mineral names. Am. Mineral. 78, 672-678.

Jarchovský T. (2006) The nature and genesis of greisen stocks at Krásno, Slavkovský les area - western Bohemia, Czech Republic. J. Czech Geol. Soc. 51, 3-4, 201-216.

Jirásek J., Matýsek D., Vaculíková L., Sivek M. (2015) Hollandit a kryptomelan z Poniklé u Jílemnice, Česká republika. Bull. mineral.-petrolog. Odd. Nár. Muz. 23, 1, 103-108.

Khosrawan-Sazedj F. (1982) The crystal structure of meta-uranocircite II, Ba(UO₂)₂(PO₄)₂ . 6H₂O. Tscher. Miner. Petrog. 29, 193-204.

Lasic B., Armbruster T., Chopin C., Grew E. S., Baronnet A., Palatinus L. (2014): Superspace description of wagnerite-group minerals (Mg, Fe, Mn)₂(PO₄)(OH, F). Acta Crystallogr. B70, 243-258.

Locock A. J., Burns P. C., Flynn T. M. (2005) Structures of strontium- and barium-dominant compounds that contain the autunite-type sheet. Can. Mineral. 43, 721-733.

Lottermoser B. G., Lu J. (1997) Petrogenesis of rare-element pegmatites in the Olary Block, South Australia, part 1. Mineralogy and chemical evolution. Miner. Petrol. 59, 1-2, 1-19.

Miura H. (1986) The crystal structure of hollandite. Mineral. J. 13, 119-129.

Neiva A. M. R., Silva M. M. V. G., Antunes I. M. H. R., Ramos J. M. F. (2000) Phosphate minerals of some granitic rocks associated quartz veins from northern and central Portugal. J. Czech Geol. Soc. 45, 1-9.

Pácal Z., Pavlů D. (1972) Nové poznatky o ložisku sodno-draselných živců Vysoký kámen u Krásna. Geol. průzk. 14, 12, 357-360.

Pauliš P. (1990) Autunit z Vysokého kamene (Krásno) u Horního Slavkova. Čas. Miner. Geol. 35, 1, 105-106.

Pauliš P., Ludvík J., Pour O., Malíková R. (2014) Hollandit z Vysokého Kamene u Krásna. Minerál 22, 6, 530-532.

Post J. E., Von Dreele R. B., Buseck P. R. (1982) Symmetry and cation displecements in hollandites: structure refinements of hollandite, cryptomelane and priderite. Acta Cryst. B38, 1056-1065.

Rea J. R., Kostiner E. (1972) The crystal structure of manganese fluorophosphate, Mn₂(PO₄)F. Acta Cryst. B28, 2525-2529.

Sejkora J., Ondruš P., Fikar M., Veselovský F., Mach Z., Gabašová A. (2006a) New data on mineralogy of the Vysoký Kámen deposits near Krásno, Slavkovský les area, Czech Republic. J. Czech Geol. Soc. 51, 1-2, 43-55.

Sejkora J., Ondruš P., Fikar M., Veselovský F., Mach Z., Gabašová A., Škoda R., Beran P. (2006b) Supergene minerals at the Huber stock and Schnöd stock deposits, Krásno ore district, the Slavkovský les area, Czech Republic. J. Czech Geol. Soc. 51, 1-2, 57-101.

Sejkora J., Škoda R., Ondruš P., Beran P., Süsser C. (2006c) Mineralogy of phosphate accumulations in the Huber stock, Krásno ore district, Slavkovský les area, Czech Republic. J. Czech Geol. Soc. 51, 1-2, 103-147.

Sejkora J., Vavřín I. (2014) Vybrané supergenní minerály uranu z tachovské rudní oblasti (Česká republika). Bull. mineral.-petrolog. Odd. Nár. Muz. 22, 123-130.

Stormer J. C. Jr., Pierson M. L., Tacker R. C. (1993) Variation of F and Cl X-ray intensity due to anisotropic diffusion in apatite during electron microprobe analysis. Am. Mineral. 78, 641-648.

Tadini C. (1981) Magniotriplite: its crystal structure and relation to the triplite-triploidite group. Bull. Minéral. 104, 677-680.

Vicat J., Fanchon E., Strobel P., Tran Qui D. (1986) The structure of K_1.33Mn₈O₁₆ and cation ordering in hollandite-type structures. Acta Cryst. B42, 162-167.

Vochten R. F., Van Haverbeke L., Van Springel K. (1992) Transformation of chernikovite into meta-uranocircite II, Ba(UO₂)₂(PO₄)₂.6H₂O and study of its solubility. Mineral. Mag. 56, 367-372.

Waldrop L. (1969) The crystal structure of triplite, (Mn,Fe)₂FPO₄. Z. Kristallogr. 130, 1-14.

Walenta K. (1963) Über die Barium-Uranylphosphatmineralien Uranocircit I, II und Metauranocircit I, II von Menzenschwand im südlichen Schwarzwald. Jh. Geol. Landesamt. Baden-Württ. 6, 113-135.