| 释义 |
ranciéite Min.|rænsiːˈeɪaɪt|
Also rancieite, † rancierite.
[ad. F. rancierite (A. Leymerie Cours de la Minéralogie (1857) ii. 329), f. Rancié (formerly also Rancier), name of the mountain near Vicdessos, Ariège, France, where it was first found: see -ite1.]
A hydrated oxide of calcium and manganese, (Ca,Mnii)Mniv4O9·3H2O, occurring as soft flakes and as compact or friable masses.
1861H. W. Bristow Gloss. Mineral. 313/1 Rancierite... Occurs in earthy masses of a deep brown colour. Soils the fingers. 1907Mineral. Mag. XIV. 408 Rancieite. (Collection de Minéralogie du Muséum d'Histoire Naturelle, Paris, Guide du Visiteur, 2nd edit., 1900, p. 29 (Ranciéite).) The correct spelling of rancierite (A. Leymerie), a variety of wad. 1923Mineral. Abstr. II. 144 A mineral found by G. Friedel in the haematite of Villerouge, Aude, was identified as rancieite of Lacroix. 1943Econ. Geol. XXXVIII. 594 The manganese is in the form of ranciéite, a finely flaky, soft, brownish-black, hydrous calcium-manganese oxide, mixed with calcium carbonate in the form of calcareous tuffs. 1969Mineral. Abstr. XX. 225/2 Ranciéite, from old workings at Rancié, forms soft brown scales with metallic lustre;..pleochroic yellow to deep brown. 1979Nature 12 July 137/1 That rancieite belongs to the birnessite group (family) has been established by Bardossy and Brindley. |