| 单词 |
roscherite |
| 释义 |
roscherite Min.|ˈrɒʃəraɪt|
[ad. G. roscherit (F. Slavík 1914, in Bull. internat. de l'Acad. tchèque des Sciences, Prague XIX. 109), f. the name of Walter Roscher (fl. 1914), German apothecary and mineral collector: see -ite1.]
A hydrated basic phosphate of beryllium, calcium, iron, and manganese, (Ca,Mn,Fe)3Be3(PO4)3(OH)3.2H2O, sometimes also containing magnesium, found as yellowish-green to brown crystals in granite and pegmatite.
The presence of beryllium in roscherite was not discovered until 1958, the mineral previously having been believed to contain aluminium.
1916Chem. Abstr. X. 31 Roscherite is a new monoclinic mineral occurring as short thick plates and also as slender prismatic and thin tabular crystals. 1958Amer. Mineralogist XLIII. 824 Roscherite from the Sapucaia pegmatite mine occurs as single crystals, crystal aggregates, and granular crusts in vugs in muscovite. 1975Tschermaks Mineral. und Petrogr. Mitteilungen XXII. 266 Roscherite from Lavra da Ilha, Taquaral, Minas Gerais is a magnesian roscherite. |
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