| 释义 |
howlite Min.|ˈhaʊlaɪt|
[f. the name of Henry How (d. 1879), mineralogist of Nova Scotia, who first described it: see -lite.]
A hydrated calcium borosilicate, Ca2B5SiO9(OH)5, that typically occurs as white nodules forming compact structureless masses resembling unglazed porcelain.
1868J. D. Dana Syst. Min. (ed. 5) 598 Howlite. Silico⁓borocalcite H. How... 1868. Howlite Dana. In small rounded imbedded nodules. Texture compact, without cleavage; also chalk-like or earthy. 1917Amer. Mineralogist II. 1 Not all fine grained, compact hydrous calcium borate is priceite; a number of such specimens from California localities..have been examined microscopically and all proved to be howlite. 1957Ibid. XLII. 521 The mineral howlite, H5Ca2SiB5O14, has been recorded from a number of localities in California and elsewhere..and microscopic crystals have been described.., but in general the mineral is massive and very fine granular. |