| 释义 |
ningyoite Min.|ˈnɪŋgjəʊaɪt|
[f. Ningyo, the name of a pass in Tottori Prefecture, Japan + -ite1.]
A hydrated phosphate of calcium and uranium, CaUiv(PO4)2.i½H2O, in which there is some replacement of uranium by lanthanons and which is found as brown or brownish-green orthorhombic crystals.
1959T. Muto et al. in Amer. Mineralogist XLIV. 634 The new mineral, ningyoite, is named for the locality, Ningyo Pass. Ibid. 649 The synthetic ningyoite ignited at 600°C. in air for 5–10 minutes still retained the original orthorhombic structure. 1962Mineral. Jrnl. III. 306 Ningyoite contains almost all the rare earths and their abundance ratio resembles that of apatite. 1970Econ. Geol. LXV. 470 For the formation of ningyoite, fixation of much sulfur in comparison with carbonaceous matter should occur before the penetration of uranium-carrying solutions. |