sanidinen.
/ˈsanɪdiːn/ Mineralogy.
A glassy variety of orthoclase, found in flat crystals (Chester).
ΚΠ
1815 A. Aikin Man. Mineral. (ed. 2) 197 Glassy Felspar. Sanidin.
1849 J. Nicol Man. Mineral. 121 The glassy felspar or sanadine is by some considered a distinct species.
1867 W. T. Brande & G. W. Cox Dict. Sci., Lit. & Art (new ed.) III. 342/1 Sanidine, a name given to Glassy Felspar, on account of the tabular form of its crystals.
Derivatives
saniˈdinic adj. containing sanidine.
ΚΠ
1885 Encycl. Brit. XVIII. 748/2 Modern volcanic rocks (quartzose trachyte, amphiboliferous and sanidinic trachyte).
ˈsanidinite n. a rock consisting largely of sanidine.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > other igneous
clay-stone1777
variolite1781
pyroxenite1845
aplite1862
anorthosite1863
teschenite1866
yellow ground1883
kimberlite1887
sanidinite1887
websterite1890
essexite1891
monzonite1895
missourite1896
theralite1898
heronite1899
kentallenite1900
carbonatite1924
wonderstone1936
1887 Mineral. Mag. 7 227 The blocks of sanidinite and laacher-trachyte occur of all sizes up to masses measuring two feet in diameter... The sanidinite consists principally of sanidine, or of sanidine and nosean.
1916 J. A. Thomson in David & Priestley Brit. Antarctic Exped. 1907–9: Geol. II. 139 Trachytes appear to have the power of converting inclusions of such rocks as older trachytes, gneisses and granulites into sanidinites.
1962 N.Z. Jrnl. Geol. & Geophysics 5 395 The finest examples of sanidinites..were obtained from a zone of yellowish-green glass, in some places as much as half an inch in thickness, formed at the contact between porcellanite and overlying basalt.
This entry has not yet been fully updated (first published 1909; most recently modified version published online June 2019).
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n.1815