Etymology: German melanozerit, from melan- + zerit cerite
: a mineral consisting of a complex silicate, borate, tantalate, fluoride, or other compound of cerium, yttrium, calcium, and other metals and occurring in brown or black rhombohedral crystals
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melanocerite Min.(mɛlənəʊˈsɪəraɪt)
A fluo-silicate of cerium and yttrium found in black tabular crystals (Chester Dict. Min. 1896).
Useful english dictionary. 2012.