| 单词 |
tungstenite |
| 释义 |
tungstenite Min.|ˈtʌŋstənaɪt|
[f. tungsten + -ite1.]
†1. = tungsten 2. Obs.
1796Kirwan Elem. Min. (ed. 2) II. 308 Tungstenite... This substance is capable of existing in three states. That of a Regulus, which I call Tungstenite. Ibid., Tungstenite... Hitherto it has been produced only in very minute Globules, being more difficulty reducible to a Metallic State than Manganese or Uranite.
2. = tungsten 1.
1894Muir & Morley Watts' Dict. Chem. IV. 797 Tungstenite, or scheelite (tungstate of Ca[lcium])..occur in various localities.
3. A tungsten sulphide, probably WS2, that occurs as both hexagonal and rhombohedral polytypes in dark grey scaly aggregates that mark the fingers.
1917Wells & Butler in Jrnl. Washington Acad. Sci. VII. 596 It is..a pleasure to announce the discovery of tungsten sulphide..from..Utah... On account of the apparent resemblance to molybdenite in formula and some of its properties the new mineral has been named tungstenite. 1970Canad. Mineralogist X. 731 It is virtually impossible to distinguish the x-ray powder pattern of a given polytype of molybdenite from the same polytype of tungstenite... Consequently it is quite possible that tungstenite is more widespread than the literature indicates. |
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