melanovanaditen.
/ˌmɛlənə(ʊ)ˈvanədʌɪt/, U.S. /ˌmɛlənoʊˈvænəˌdaɪt/, /ˌmɛlənəˈvænəˌdaɪt/ Mineralogy.
A triclinic hydrated oxide of calcium and vanadium occurring as aggregates of opaque black prismatic crystals.
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the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > other oxides > oxides of two elements
honey stone1792
bismuth-ochre1796
mellilite1796
melilithus1800
mellite1801
melilite1814
manganesite1823
heterocline1844
romeine1844
crednerite1849
roméite1849
whewellite1852
manganite1865
magnesioferrite1868
oxammite1870
molybdomenite1885
lautarite1892
tripuhyite1897
coronadite1904
hollandite1906
melanovanadite1921
quenselite1926
salesite1939
yttrotungstite1950
ordoñezite1953
1921 W. Lindgren in Proc. National Acad. Sci. U.S.A. 7 249 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 melanovanadite, in allusion to it being practically the only vanadium mineral of a deep black color.
1956 Science 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 melanovanadite and abundant crystals of hexagonal native selenium.
1968 I. Kostov Mineral. ii. 470 Simplotite and melanovanadite have perfect {010} cleavage.
1990 Amer. Mineralogist 75 511/1 It consists of VO4 tetrahedra and V2O8 double-pyramid groups corner-linked into a sheet arrangement. The mineral melanovanadite (CaV4O10.10H2O) has recently been found to be based on this type of structure.
This entry has been updated (OED Third Edition, June 2001; most recently modified version published online March 2022).
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n.1921