单词 | howlite |
释义 | howliten. Mineralogy. A hydrated calcium borosilicate, Ca2B5SiO9(OH)5, that typically occurs as white nodules forming compact structureless masses resembling unglazed porcelain. ΘΚΠ the world > the earth > minerals > types of mineral > silicates > miscellaneous silicates > [noun] > other silicates of two elements bustamite1830 nickel-gymnite1853 uranophane1861 genthite1867 howlite1868 uranotile1871 peckhamite1880 kentrolite1882 melanotekite1882 åkermanite1890 molybdophyllite1901 ramsayite1924 truscottite1925 reedmergnerite1954 1868 J. D. Dana Syst. Mineral. (ed. 5) 598 Howlite. Silicoborocalcite H. How... 1868. Howlite Dana. In small rounded imbedded nodules. Texture compact, without cleavage; also chalk-like or earthy. 1917 Amer. Mineralogist 2 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. 1957 Amer. Mineralogist 42 521 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. This entry has not yet been fully updated (first published 1933; most recently modified version published online March 2022). < |
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