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scapolite

[skap-uh-lahyt] /ˈskæp əˌlaɪt/
noun
1.
any of a group of minerals of variable composition, essentially silicates of aluminum, calcium, and sodium, occurring as massive aggregates or tetragonal crystals.
2.
the member of the scapolite group intermediate in composition between meionite and marialite; wernerite.
Origin
1795-1805
1795-1805; < German Skapolith. See scape, -o-, -lite
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for scapolite
  • Late carbonate veins and replacements cut intrusive rocks and scapolite is a common alteration mineral in volcanic rocks.
British Dictionary definitions for scapolite

scapolite

/ˈskæpəˌlaɪt/
noun
1.
any of a group of colourless, white, grey, or violet fluorescent minerals consisting of sodium or calcium aluminium silicate, carbonate, and chloride in tetragonal crystalline form. They occur mainly in impure limestones and pegmatites Also called wernerite
Word Origin
C19: from German Skapolith, from Greek skapos rod + -lite
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for scapolite

any of a group of feldspathoid minerals found in calcium-rich metamorphic rocks, particularly marble, gneiss, granulite, greenschist, and skarns. Principal occurrences are Quebec and Ontario, Canada; Kiruna, Swed.; Pennsylvania, United States; and Queensland, Australia. These minerals form a solid-solution (chemical-replacement) series in which sodium and calcium replace each other in the molecular structure. Marialite, a sodium aluminosilicate, and meionite, a calcium aluminosilicate, are the theoretical end-members (pure compounds); they have been synthesized but occur in nature only with at least 20 percent substitution of one for the other. Wernerite (the former group name) has been used for members of intermediate composition between marialite and meionite. For chemical formulae and detailed physical properties, see feldspathoid (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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