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单词 johannsenite
释义 johannsenite Min.|dʒəʊˈhænsənaɪt|
[f. the name of Albert Johannsen (1871–1962), American geologist: see -ite1.]
A brown, greyish, or greenish silicate of calcium and manganese, CaMnSi2O6, which often occurs with partial substitution of ferrous iron for manganese.
1932Amer. Mineralogist XVII. 575 The Mineralogical Society of America... List of papers to be presented Wednesday, December 28, 1932... W. T. Schaller.—Johannsenite, a new manganese pyroxene.1963W. A. Deer et al. Rock-Forming Min. II. 75 Johannsenite, the manganese analogue of diopside and hedenbergite, occurs in metasomatized limestones, and is found less frequently as a vein mineral.
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