Dawsonite is a mineral composed of sodium aluminium carbonate hydroxide, chemical formula NaAlCO3(OH)2. It crystallizes in the orthorhombic crystal system. It is not mined for ore. It was discovered in 1874 during the construction of the Redpath Museum in a feldspathic dike on the campus of McGill University on the Island of Montreal, Canada. It i...
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http://en.wikipedia.org/wiki/Dawsonite
• (n.) A hydrous carbonate of alumina and soda, occuring in white, bladed crustals.
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http://thinkexist.com/dictionary/meaning/dawsonite/
a carbonate mineral, NaAlCO3 (OH)2, that is probably formed by the decomposition of aluminous silicates. Of low-temperature, hydrothermal origin, it ... [1 related articles]
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http://www.britannica.com/eb/a-z/d/14
Daw'son·ite noun [ Named after J. W.
Dawson of Montreal.]
(Min.) A hydrous carbonate of alumina and soda, occuring in white, bladed crustals.
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http://www.encyclo.co.uk/webster/D/9
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