ISSN

print 2570-7337
online 2570-7345

Zýkait z dolu Lehnschafter u Mikulova v Krušných horách (Česká republika) - popis a Ramanova spektroskopie

Zýkaite from the Lehnschafter mine near Mikulov in the Krušné hory Mts. (Czech Republic) - description and Raman spectroscopy


DOI: https://doi.org/10.46861/bmp.29.241

Klíčová slova

Abstrakt

The zýkaite samples were found at abandoned Lehnschafter mine near Mikulov in the Krušné hory Mts. (Czech Republic). It occurs as irregular white to light greenish rounded to spherical aggregates up to 1.5 cm in size composed of tiny acicular crystals up to 5 - 10 μm in length. Its empirical formula can be expressed as (Fe3.79Al0.02)Σ3.81[(AsO4)2.66(PO4)0.20(SiO4)0.07]Σ2.93 (SO4)1.07(OH)0.44·15H2O (mean of 3 spot analyzes; on the basis of As+P+S+Si = 4 apfu).Zýkaite is probably monoclinic, with the unit-cell parameters refined from X-ray powder diffraction data: a 21.195(8), b 7.052(2), c 36.518(17) Å, β 91.07(2)° and V 5458(2) Å3. Raman spectroscopy documented the presence of both (AsO4)3- and (SO4)2- units in the crystal structure of zýkaite. Multiple Raman bands connected with vibrations of water molecules and (AsO4)3- groups indicate the presence of more structurally non-equivalent these groups in the crystal stucture of zýkaite.

Soubory

Abstrakt (PDF) - 201.81KB
Fulltext (PDF) - 3.30MB

Reference

Burnham ChW (1962) Lattice constant refinement. Carnegie Inst Washington Year Book 61: 132-135

Culka A, Kindlová H, Drahota P, Jehlička J (2016) Raman spectroscopic identification of arsenate minerals in situ at outcrops with handheld (532 nm, 785 nm) instruments. Spectrochim Acta Part A: Mol Biomol Spectrosc 154: 193-199. https://doi.org/10.1016/j.saa.2015.10.025

Čech F, Jansa J, Novák F (1978) Zýkaite, Fe43+(AsO4)3(SO4)(OH)·15H2O, a new mineral. N Jb Mineral, Mh: 134-144

Drahota P, Grösslová Z, Kindlová H (2014) Selectivity assessment of an arsenic sequential extraction procedure for evaluating mobility in mine wastes. Anal Chim Acta 839: 34-43. https://doi.org/10.1016/j.aca.2014.06.022

Drechsel M, Maruschke T, Körber T (2021) Reiche Silbererze, klassische Mineralien: Die Beschert Glück Fundgrube bei Freiberg, Sachsen. Lapis 46(7-8): 12-43; 90

Dvořák Z, Gramblička R, Radoň M, Števko M (2012) Rudní revír Hrob - Mikulov v Krušných horách. Minerál 20: 37-43

Frost RL, Palmer SJ, Xi Y (2011) Vibrational spectroscopy of the multi-anion mineral zykaite Fe4(AsO4)(SO4)(OH)·15H2O-implications for arsenate removal. Spectrochim Acta A: Mol Biomol Spectrosc 83(1): 444-448. https://doi.org/10.1016/j.saa.2011.08.062

Haffert L, Craw D, Pope J (2010) Climatic and compositional controls on secondary arsenic mineral formation in high-arsenic mine wastes, South Island, New Zealand. N Zeal J Geol Geophys 53: 91-101. https://doi.org/10.1080/00288306.2010.498403

Chaloupka P (2015) Historie a současnost prohlídkové štoly Lehnschafter v Mikulově v Krušných horách. Minerál 23: 368-372

Kratochvíl J (1957-1966) Topografická mineralogie Čech. I-VIII. ČSAV, Praha

Libowitzky E (1999) Correlation of O-H stretching frequencies and O-H´´´O hydrogen bond lengths in minerals. Monat Chem130: 1047-1059. https://doi.org/10.1007/BF03354882

Lutz HD (1995) Hydroxide ions in condensed materials – Correlation of spectroscopic and structural data. In Structure and bonding, Vol. 82, p. 86-103, Springer Berlin

Majzlan J, Lazic B, Armbruster T, Johnson MB, White MA, Fisher RA, Plášil J, Loun J, Škoda R, Novák M (2012) Crystal structure, thermodynamic properties, and paragenesis of bukovskýite, Fe2(AsO4)(SO4)(OH)·9H2O. J Mineral Petrol Sci (Jpn) 107: 133-148. https://doi.org/10.2465/jmps.110930

Majzlan J, Amoako FY, Kindlová H, Drahota P (2015) Thermodynamic properties of zýkaite, a ferric sulfoarsenate. Appl Geochem 61: 294-301. https://doi.org/10.1016/j.apgeochem.2015.06.007

Nakamoto K (1986) Infrared and Raman spectra of inorganic and coordination compounds. J. Wiley and Sons, New York

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, Vavřín I, Frýda J, Čejka J, Gabašová A (1997) Secondary minerals of the Jáchymov (Joachimsthal) ore district. J Czech Geol Soc 42: 3-76

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

Rieck B, Kolitsch U, Voudouris P, Giester G, Tzeferis P (2018) Weitere Neufunde aus Lavrion, Griechenland. Mineralien-Welt 29(5): 32-77

Ryskin YaI (1974) The vibrations of protons in minerals: Hydroxyl, water and ammonium. In The infrared spectra of minerals (V.C. Farmer, ed.): 111-118. Mineralogical Society London

Sattran V (1959) Polymetalické zrudnění ve východních Krušných horách. Sbor Ústř Úst geol 25:135-185

Siuda R (2012) Supergene parageneses of the Radzimowice deposit (Kaczawa Ms., Poland). Przegl Geol 60: 422-449

Witzke T, Hocker M (1993) Neue Vorkommen von Bukovskyit, Zykait und Kankit. Lapis 18(6): 49-50