| 单词 |
melanotekite |
| 释义 |
melanotekite Min.|ˌmɛlənəʊˈtiːkaɪt|
[ad. Sw. melanotekit (G. Lindström 1880, in Öfversigt af K. Vetenskaps-Akad. Förhandl. XXXVII. vi. 56), f. Gr. µελανο- melano- + τήκ-ειν to melt, dissolve: see -ite1.]
A black to dark grey silicate of lead and iron (see quot. 1962).
1882Jrnl. Chem. Soc. XLII. 291 Melanotekite, so called from its behaviour before the blowpipe (fusion to a black bead),..is a black to blackish-grey mineral, often with a bluish tinge. 1962Arkiv för Mineral. och Geol. III. 143 Kentrolite and melanotekite are isostructural. They form a series with the end-members Pb2Mn2Si2O9 and Pb2Fe2Si2O9... Kentrolite can be defined as those members of this series which contain more than 50 mol per cent Pb2Mn2Si2O9, and the others are called melanotekite. 1968Amer. Mineralogist LIII. 1278 The synthesis of melanotekite (Pb2Fe2Si2O9), kentrolite (Pb2Mn2Si2O9) and of intermediate members of this complete solid solution series has been reported elsewhere (Ito and Frondel, 1967). Using similar procedures, we have synthesized the Sc, Ga and Cr analogues of these compounds. |
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