1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
ENSTATITE, a rock-forming mineral belonging to the group of orthorhombic pyroxenes. It is a magnesium metasilicate, MgSiOs, often with a little iron replacing the magnesium: as the iron increases in amount there is a transition to bronzite (<?.».), and with still more iron to hypersthene (q.v.). Bronzite and hypersthene were known long before enstatite, which was first described by G. A. Kenngott in 1855, and named from h><jTa.rris, " an opponent," because the mineral is almost infusible before the blowpipe: the ma…
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- Vol. 9, pp. 654-654