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Staurolit (Karsten, 1800), chemický vzorec (Fe,Mg,Zn)2(Al,Fe)9(Si,Al)4O22(O,OH)2 je jednoklonný minerál ze skupiny nesosilikátů. Název pochází z řeckých slov σταυρός (staurós) = kříž a λίθος (líthos) = kámen; staurolit vytváří často prorostlice ve tvaru kříže.
Naleziště, Původ & Parageneze
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krystaly fe mg zn al jsou vlastnosti prorostlice minerál oh naleziště barva cm chemický vzorec 4o22 často minerály sloupcovité tvrdost
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Staurolit | Barva | červenohnědý až černohnědý | 1.00 | infobox |
| Staurolit | Chemický vzorec | (Fe,Mg,Zn)2(Al,Fe)9(Si,Al)4O22(O,OH)2 | 1.00 | infobox |
| Staurolit | Hustota | 3,7–3,8 g ⋅ cm−3 | 1.00 | infobox |
| Staurolit | Index lomu | nα = 1,736–1,747 nβ = 1,740–1,754 nγ = 1,745–1,762 | 1.00 | infobox |
| Staurolit | Kategorie | Minerál | 1.00 | infobox |
| Staurolit | Lesk | skelný, matný | 1.00 | infobox |
| Staurolit | Rozpustnost | částečně v H2SO4 | 1.00 | infobox |
| Staurolit | Soustava | jednoklonná | 1.00 | infobox |
| Staurolit | Tvrdost | 7–7,5 | 1.00 | infobox |
| Staurolit | Vryp | bílý | 1.00 | infobox |
| Staurolit | Vzhled krystalu | krátké sloupcovité krystaly | 1.00 | infobox |
| Staurolit | Štěpnost | dobrá | 1.00 | infobox |
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