| 单词 |
collophane |
| 释义 |
collophane Min.|ˈkɒləfeɪn|
[ad. G. kollophan (K. L. F. von Sandberger 1870, in Neues Jahrb. f. Min., Geol. u. Paläont. 308), f. Gr. κόλλ-α glue + -o + ϕαν-ός bright, clear (ϕαίνειν to show).]
Any of the massive cryptocrystalline varieties of apatite, consisting largely of phosphate and carbonate of calcium, which are the main constituents of phosphate rock and fossil bone.
1917A. F. Rogers in Jrnl. Geol. XXV. 531 Collophane is a calcium carbonophosphate approaching the formula given above. [Note] Dana changed kollophan to collophanite, but since the name has not come into general use it is preferable to use the English equivalent of the original. 1962W. A. Deer et al. Rock-Forming Min. V. 334 The mineralogy of such phosphorites is complex...The name collophane has been applied to the cryptocrystalline mineral component, and is a term analogous to ‘limonite’: it is of use only when the apatite-like phase cannot be definitely identified. 1966Bull. Geol. Surv. Great Britain xxv. 19 During an investigation by the Atomic Energy Division into the occurrence of uranium in phosphates, uraniferous collophane was identified in specimens collected..from Odin Mine, near Castleton. |
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