单词 | celsian |
释义 | celsiann. Mineralogy. A colourless, white, or pale yellow mineral of the monoclinic crystal system which is a barium-containing feldspar, BaAl2Si2O8, dimorphous with paracelsian and occurring mostly in association with manganese deposits. ΚΠ 1897 Mineral. Mag. 11 325 A list of new mineral names... Celsian. H. Sjögren... Barium anorthite... Sweden. 1907 Mineral. Mag. 14 406 Paracelsian..is near to celsian..in composition and optical characters, but..possessing only poor cleavage. 1934 Proc. Royal Soc. A. 145 91 The potassium and barium ions in orthoclase, hyalophane and celsian are surrounded by six oxygen atoms at 2·85 A. and four at 3·1 A. 1995 Glass (Nexis) July s2 Sol-gel barium osumilite..was the dominant phase after 3h at 1200°C. Despite this, small amounts of celsian, hexacelsian and cordierite were present even after prolonged heat treatment. This is a new entry (OED Third Edition, June 2005; most recently modified version published online December 2021). < n.1897 |
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