
1) Carbonate mineral 2) Mineral 3) Orthorhombic mineral
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1) Strontian
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Strontianite (SrCO3) is an important raw material for the extraction of strontium. It is a rare carbonate mineral and one of only a few strontium minerals. It is a member of the aragonite group. Aragonite group members: The ideal formula of strontianite is SrCO3, with molar mass 147.63 g, but calcium Ca can substitute for up to 27% of the strontiu...
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http://en.wikipedia.org/wiki/Strontianite

• (n.) Strontium carbonate, a mineral of a white, greenish, or yellowish color, usually occurring in fibrous massive forms, but sometimes in prismatic crystals.
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a strontium carbonate mineral (SrCO3) that is the original and principal source of strontium. It occurs in white masses of radiating fibres, although ... [1 related articles]
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http://www.britannica.com/eb/a-z/s/173
Stron'ti·an·ite noun (Min.) Strontium carbonate, a mineral of a white, greenish, or yellowish color, usually occurring in fibrous massive forms, but sometimes in prismatic crystals.
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http://www.encyclo.co.uk/webster/S/213

Strontianite is a natural source of strontium, named after Strontian in Argyleshire where it was discivered in 1792 by Hope. Physically it is similar to cerussite and witherite. It is associated with barite, celestite, and calcite in veins in limestone. Occasionally it is found in igneous rocks and as a gangue mineral in sulphide veins. It has the ...
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[
n] - a mineral consisting of strontium carbonate
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http://www.webdictionary.co.uk/definition.php?query=strontianite
noun a mineral consisting of strontium carbonate
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https://www.encyclo.co.uk/local/20974

a mineral, strontium carbonate, SrCO, occurring in radiating, fibrous, or granular aggregates and crystals, varying from white to yellow and pale green: a minor ore of strontium.
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https://www.infoplease.com/dictionary/strontianite
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