| 单词 |
roesslerite |
| 释义 |
roesslerite Min.|ˈrɜːsləraɪt|
Also rösslerite.
[ad. G. rösslerit (R. Blum 1861, in Jahresber. der Wetterauischen Ges. für die ges. Naturkunde 33), f. the name of Carl Rössler, 19th-c. German scientist: see -ite1.]
A hydrated acid arsenate of magnesium, MgHAsO4.7H2O, which occurs as small colourless plates forming an oxidized crust on some arsenical deposits, and has been prepared artificially.
1868J. D. Dana Syst. Min. (ed. 5) 556 A mineral in monoclinic crystals occurs at Joachimsthal and Kremnitz...which is probably rœsslerite. 1903Jrnl. Chem. Soc. LXXXIV. ii. 656 Crystals..of the arsenic compound, (NH4)MgAsO4,6H2O, isomorphous with struvite were obtained, and at the same time crystals of rösslerite (MgHAsO4,7H2O). 1951C. Palache et al. Dana's Syst. Min. (ed. 7) II. 712 Artificial roesslerite is precipitated together with MgNH4AsO4. 6H2O..from an acid solution of disodium arsenate and ammonium sulfate by a solution of magnesium sulfate. 1973Acta Crystallographica B. XXIX. 287/1 Roesslerite is biaxial negative. |
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