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xenolite
xenolite n. 
/ˈzinəˌlaɪt/ [-lite comb. form1] Mineralogy a silicate of aluminium, allied to fibrolite.
Brit. /ˈzɛnə(ʊ)lʌɪt/
, /ˈzɛnə(ʊ)lʌɪt/U.S. /ˈzɛnəˌlaɪt/
, /ˈzɛnəˌlaɪt//ˈzinəˌlaɪt/ΘΚΠ
the world > the earth > minerals > types of mineral > silicates > nesosilicates > [noun] > subsaturate group > sillimanite or fibrolite
fibrolite1802
sillimanite1823
bucholzite1831
xenolite1844
1844 J. D. Dana Min. (1868) 374 Xenolite..resembles fibrolite..excepting in the high specific gravity.
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