meionite


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meionite

(ˈmaɪəˌnaɪt)
n
(Geological Science) a scapolite, Ca4Al6Si6O24CO3, that is isomorphous with marialite
References in periodicals archive ?
Meanwhile, in his Mineral Zone warehouse on North Main Street (mentioned earlier), Marcus Origlieri offered about 20 loose, fat, medium-purple, partially gemmy crystals of meionite (the most common of the three members of the scapolite group), from Badakhshan.
5-mm colorless, translucent to transparent trapezohedral crystals and shells in cavities in heavily etched meionite.
At locality 44, pseudomorphs of albite after trapezohedral analcime crystals up to 1 cm were found in fine-grained, massive laumontite associated with meionite, titanite, fluorapatite and rare zircon.
This sample, which is physically indistinguishable from other chabazite-Ca specimens, consists of colorless, 1 to 2-mm rhombohedral crystals associated with heulandite-Ca and meionite.
Analyses performed in the scapolites from this deposit (Table 1) show marialite contents very near to 50%, but slightly higher than meionite.
Relationship to other species: A member of the scapolite group; specifically, the sulfate-dominant analogue of meionite.
Most of these species, plus excellent microcrys-tal specimens of sodalite, meionite, hauyine and sodalite, are easily obtainable by exchange.
Still, the big pieces were admired as uniquely instructive, especially his large Siberian beryl, his large meionite crystal group from Vesuvius, a large proustite/pyrargyrite from the Harz Mountains, and a big native silver from "Spanish America.