单词 | sillimanite |
释义 | sillimaniten. Mineralogy. An aluminosilicate mineral which occurs as slender colourless prisms and in fibrous masses, and is a common constituent of metamorphic rocks, esp. gneiss.Chemical formula: Al2SiO5. Crystal system: orthorhombic. ΘΚΠ the world > the earth > minerals > types of mineral > silicates > nesosilicates > [noun] > subsaturate group > sillimanite or fibrolite fibrolite1802 sillimanite1823 bucholzite1831 xenolite1844 1823 G. T. Bowen in Jrnl. Acad. Nat. Sci. Philadelphia 3 381 The substance which I have analyzed must be considered as a new species in mineralogy, and I propose for it the name of Sillimanite, in honour of Professor Silliman of Yale College. 1888 F. Rutley Rock-forming Minerals 167 Sillimannite is a mineral of frequent occurrence in gneiss and other crystalline schists. 1929 G. P. Merrill Minerals from Earth & Sky ii. iv. 294 The commonplace and little prized minerals, andalusite, sillimanite, and cyanite, are being utilized to give strength to..porcelain spark plugs. 1974 Nature 16 Aug. 562/2 The Clare Castle gneisses are coarse grained and weakly banded... Modes vary within the range: garnet 20–30%, sillimanite 5–20%, [etc.]. 2004 W. D. Nesse Introd. Optical Mineral. (ed. 3) xiv. 250/2 Most sillimanite is relatively pure AlAlOSiO4. This entry has been updated (OED Third Edition, December 2013; most recently modified version published online March 2022). < n.1823 |
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