ISSN
print 2570-7337
online 2570-7345
Neustädtelite group minerals from Jáchymov in the Krušné hory Mts. (Czech Republic)
Keywords
Abstract
Neustädtelite and not-yet approved Zn-analogue of neustädtelite (Zn-neustädtelite) were found in material from the Geister vein, western part of the Jáchymov ore district, the Krušné hory Mts., Czech Republic. Neustädtelite occurs as orange brown crystalline aggregates in association with walpurgite, bismutite, eulytine, preisingerite and zavaritskite. It is triclinic, space group P-1, the unit-cell parameters refined from X-ray powder diffraction data are: a 4.551(2), b 6.134(4), c 9.024(5) Å, α 95.26(6)o, β 99.40(4)o, γ 92.89(5)o and V 246.9(2) Å3. Chemical analyses of neustädtelite correspond to the empirical formula Bi1.89Fe1.00(Fe0.53Al0.19Zn0.15Ni0.04Co0.03Pb0.02)Σ0.96O1.72(OH)1.77[(AsO4)1.76(PO4)0.13 (SiO4)0.11]Σ2.00 on the basis of As+P+Si = 4 apfu. Zn-neustädtelite occurs as brownish red spherical crystalline aggegates, formed by tiny tabular crystals in association with atelestite, eulytine, walpurgite and preisingerite. It is triclinic, space group P-1, with the unit-cell parameters refined from X-ray powder diffraction data: a 9.175(6), b 6.150(2), c 9.407(4) Å, α 83.52(3)°, β 70.59(4)°, γ 86.94(4)° and V 497.4(5) Å3. Chemical analyses of Zn-neustädtelite correspond to the empirical formula (Bi1.96Ca0.04)Σ2.00Fe1.00(Zn0.37Fe0.22Ni0.21Co0.15Pb0.03
Cu0.02)Σ1.00O1.23(OH)2.73[(AsO4)1.92(PO4)0.06(SiO4)0.02]Σ2.00, calculated based on the sum of As+P+Si+V = 2 apfu.
Files
References
Burnham ChW (1962) Lattice constant refinement. Carnegie Inst Washington Year Book 61: 132-135
Čejka J (1999) Infrared spectroscopy and thermal analysis of the uranyl minerals. Rev Mineral 38: 521-622
Hloušek J (2016) Jáchymov, Joachimsthal. Díl 1, díl 2. Kateřina Hloušková, Jáchymov, 595 a 537 s.
Hloušek J, Plášil J, Sejkora J, Škácha P (2014) Novinky a nové minerály z Jáchymova, (2003 - 2014). Bull mineral-petrolog Odd Nár Muz (Praha) 22: 155-181
Krause W, Bernhardt HJ, Gebert W, Graetsch H, Belendorff K, Petitjean K (1996) Medenbachite, Bi2Fe(Cu, Fe)(O,OH)2(OH)2(AsO4)2, a new mineral species: Its description and crystal structure. Am Mineral 81(3-4): 505-512. https://doi.org/10.2138/am-1996-3-424
Krause W, Bernhardt HJ, McCammon C, Effenberger H (2002) Neustädtelite and cobaltneustädtelite, the Fe3+- and Co2+-analogues of medenbachite. Am Mineral 87(5-6): 726-738. https://doi.org/10.2138/am-2002-5-616
Libowitzky E (1999) Correlation of O-H stretching frequencies and O-H···O hydrogen bond lengths in minerals. Monat Chem 130: 1047-1059. https://doi.org/10.1007/bf03354882
Macourek K, Čumrda J (1963) Zhodnocení těžební činnosti jáchymovských dolů na hydrotermálním ložisku Jáchymov. MS, archiv DIAMO, Příbram - Šachta č. 14, sv. 140166
Mrňa F (1960) Dílčí zpráva o geochemickém výzkumu komplexního zrudnění v Jáchymovské oblasti 1958- 1960. MS, archiv DIAMO, Příbram - Šachta č. 14, sv. 29
Mills SJ, Hatert F, Nickel EH, Ferraris G (2009) The standardisation of mineral group hierarchies: application to recent nomenclature proposals. Eur J Mineral 21: 1073-1080. https://doi.org/10.1127/0935-1221/2009/0021-1994
Nakamoto K (2009) Infrared and Raman spectra of inorganic and coordination compounds Part A: Theory and applications in inorganic chemistry. John Wiley and Sons Inc. Hoboken, New Jersey. https://doi.org/10.1002/9780470405840
Ondruš P (1993) ZDS - A computer program for analysis of X-ray powder diffraction patterns. Materials Science Forum, 133-136, 297-300, EPDIC-2. Enschede. https://doi.org/10.4028/www.scientific.net/msf.133-136.297
Ondruš P, Veselovský F, Hloušek J, Skála R, Frýda J, Čejka J, Gabašová A (1997a) Secondary minerals of the Jáchymov (Joachimsthal) ore district. J Czech Geol Soc 42: 3-76
Ondruš P, Veselovský F, Skála R, Císařová I, Hloušek J, Frýda J, Vavřín I, Čejka J, Gabašová A (1997b) New naturally occurring phases of secondary origin from Jáchymov (Joachimsthal). J Czech Geol Soc 42: 77-107
Ondruš P, Veselovský F, Gabašová A, Drábek M, Dobeš P, Malý K, Hloušek J, Sejkora J (2003a) Ore-forming processes and mineral parageneses of the Jáchymov ore district. J Czech Geol Soc 48: 157-192
Ondruš P, Veselovský F, Gabašová A, Hloušek J, Šrein V (2003b) Geology and hydrothermal vein system of the Jáchymov (Joachimsthal) ore district. J. Czech Geol. Soc. 48: 3-18
Ondruš P, Veselovský F, Gabašová A, Hloušek J, Šrein V (2003c) Supplement to secondary and rock-forming minerals of the Jáchymov ore district. J Czech Geol Soc 48: 149-155
Ondruš P, Veselovský F, Gabašová A, Hloušek J, Šrein V, Vavřín I, Skála R, Sejkora J, Drábek M (2003d) Primary minerals of the Jáchymov ore district. J Czech Geol Soc 48: 19-147
Pittauerová D (2002) Zvětrávání uranu na historické haldě stříbrného dolu v Jáchymově. MS, dipl práce PřFUK, 1-44
Pouchou J, Pichoir F (1985) „PAP“ (jrz) procedure for improved quantitative microanalysis. In: Armstrong JT (ed): Microbeam Analysis: 104-106. San Francisco Press San Francisco
Škácha P, Plášil J, Horák V (2019) Jáchymov: mineralogická perla Krušnohoří. Academia, Praha 682 s.