| 释义 |
melanovanadite Min.|ˌmɛlənəʊˈvænədaɪt|
[f. melano- + vanadium + -ite1.]
A black opaque oxide of calcium and vanadium that occurs as bunches of acicular monoclinic crystals.
1921W. Lindgren in Proc. Nat. Acad. Sci. VII. 249 In 1920 Mr. W. Spencer Hutchinson, Consulting Engineer for the Vanadium Company of America, brought to my attention three specimens of a mineral collected by him at Mina Ragra, Peru. He suspected that it was a new mineral, and this opinion was proved correct by chemical and optical examination. The formula is 2CaO.3V2O5.2V2O4 and I wish to propose for it the name of melano⁓vanadite, in allusion to it being practically the only vanadium mineral of a deep black color. 1956Science 1 June 990/3 Along fractures in the ore-bearing sandstone there is commonly a thin massive coating of an undescribed vanadium oxide. On this coating duttonite occurs as crusts and coatings... Associated minerals are melano⁓vanadite and abundant crystals of hexagonal native selenium. 1968I. Kostov Mineral. ii. 470 Simplotite and melanovanadite have perfect {ob}010{cb} cleavage. |