Introduction
Periodicals
Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze
2011/19/1
Meneghinit a boulangerit z lomu Prachovice v Železných horách, Česká republika
Meneghinit a boulangerit z lomu Prachovice v Železných horách, Česká republika
Jiří Litochleb, Jiří Sejkora, Pavel Škácha, Viktor Venclík, Jakub Plášil
| Pages | 35-39 |
|---|---|
| Citation | LITOCHLEB, Jiří, SEJKORA, Jiří, ŠKÁCHA, Pavel, VENCLÍK, Viktor a PLÁŠIL, Jakub. Meneghinit a boulangerit z lomu Prachovice v Železných horách, Česká republika. Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze. Prague: National Museum, 2011, 19(1), 35-39. ISSN 1211-0329 (print), 1804-6495 (online). Also available from: https://publikace.nm.cz/en/periodicals/bmpholnrhmvp/19-1/meneghinit-a-boulangerit-z-lomu-prachovice-v-zeleznych-horach-ceska-republika |
Two new primary ore minerals, meneghinite and boulangerite, were found in the active quarry near Prachovice in the Železné hory Mountains, Czech Republic. Both minerals and galena intergrow in silver-grey needle aggregates up to 6 cm on fissures of the silurian and devonian limestones. Meneghinite is orthorhombic with a = 11.3639(5), b = 24.0950(9), c = 4.1437(4) Å, V = 1134.61(4) Å3, and empirical formula (mean of six analyses, base 45 apfu): Pb12.92Cu0.91 (Sb7.03Bi0.07As0.04)Σ7.14(S23.88Se0.15)Σ24.03. Boulangerite is orthorhombic with a = 23.4990(4), b = 21.1911(2), c = 4.0329(1) Å, V = 2008.23(6) Å3, and empirical formula (mean of four analyses, base 20 apfu): Pb5.03(Sb3.94Bi0.04As0.03)Σ4.01(S10.91 Se0.06)Σ10.97. Cerussite and mimetite were determined according to PXRD and EPMA study as a supergene (sub)recent phases originated by weathering of ore minerals.
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