teruggiten.
/təˈruːdʒʌɪt/ Mineralogy.
A hydrated arsenate and borate of calcium and magnesium, Ca4MgB12O20(AsO4)2.18H2O, found as colourless or white monoclinic crystals.
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teruggite1968
1968 Aristarain & Hurlbut in Amer. Mineralogist 53 1815 Teruggite, a new borate mineral, was collected in June, 1967, during a field study of Argentine borates.
1973 Amer. Mineralogist 58 1034/2 No chemical analysis was made for the teruggite sample used in the present study. The crystal structure determination confirms the chemical composition reported by Aristarain and Hurlbut (1968) except for the water content which consists of twenty molecules instead of eighteen.
1978 Mercian Geol. VI. 264 Teruggite is rare, occurring sporadically at one horizon in the southern basin of the Emet deposits [in Turkey], as very pure white, powdery potato-shaped nodules containing countless minute white euhedral crystals.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).
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n.1968