About: Witherit z antimonitového ložiska Dúbrava (Slovenská republika)     Goto   Sponge   NotDistinct   Permalink

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Description
  • Witherite, ideally BaCO3, was identified at the Dúbrava antimony deposit, Nízke Tatry Mts., Slovak Republic. It forms irregular coarse grained white to very pale yellow aggregates up to 2.5 x 1 cm in size with vitreous to greasy lustre, which fills drusy cavities in quartz. It is closely associated together with yellow aggregates and tabular crystals of barite, crystalline Fe-rich dolomite and strontianite. Witherite was also observed as an irregular microscopic inclusions in barite. The refined unit-cell parameters of witherite from Dúbrava antimony deposit are: a = 5.3001(9) Å, b = 8.8751(14) Å, c = 6.4150(10) Å and V = 301.76(8) Å3. Quantitative chemical analyses of witherite correspond to the empirical formula (Ba0.96Sr0.04)Σ1.00CO3. The origin of witherite is hydrothermal; it was formed together with barite and strontianite as an product of late low-thermal fluids. (en)
  • Witherit, ideálne BaCO3, bol identifikovaný na antimónovom ložisku Dúbrava, Nízke Tatry, Slovenská rupeblika. Tvorí nepravidelné hrubozrnné biele až svetložlté agregáty s veľkosťou do 2,5x1 cm so skleným až mastným leskom, ktoré vypĺnajú drúzové dutiny v kremeni. Je tesne asociovaný spolu so žltými agregátmi a tabuľkovitými kryštálmi baritu, kryštalickým Fe-bohatým dolomitom a strontianitom. Witherit bol tiež zistený ako neprevidelné mikroskopické inklúzie v barite. Spresnené mriežkové parametre witheritu z antimónového ložiska Dúbrava sú: a = 5.3001(9) Å, b = 8.8751(14) Å, c = 6.4150(10) Å a V = 301.76(8) Å3. Kvantitatívne chemické analýzy witheritu zodpovedajú empirickému vzorcu (Ba0.96Sr0.04)Σ1.00CO3. Witherit vznikol hydrotermálne spolu s baritom a strontianitom ako produkt pozdných nízkotermálnych fluíd.
Title
  • Witherit z antimonitového ložiska Dúbrava (Slovenská republika)
  • Witherite from the Dúbrava antimony deposit (Slovak Republic) (en)
skos:prefLabel
  • Witherit z antimonitového ložiska Dúbrava (Slovenská republika)
  • Witherite from the Dúbrava antimony deposit (Slovak Republic) (en)
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  • RIV/00023272:_____/13:#0002106!RIV14-MK0-00023272
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  • RIV/00023272:_____/13:#0002106
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  • witherite; X-ray diffraction data; chemical composition; Dúbrava antimony deposit; Slovak Republic (en)
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  • TD - Čadská republika
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  • [EC9045DCC7AA]
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  • Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze
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  • 21
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  • Sejkora, Jiří
  • Bačík, Peter
  • Števko, Martin
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  • 1211-0329
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