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Calcium nitrate
Calcium nitrate, also called Norgessalpeter (Norwegian saltpeter), is the inorganic compound with the formula Ca(NO3)2. This colourless salt absorbs moisture from the air and is commonly found as a tetrahydrate. It is mainly used as a component in fertilizers but has other applications. Nitrocalcite is the name for a mineral which is a hydrated calcium nitrate that forms as an efflorescence where manure contacts concrete or limestone in a dry environment as in stables or caverns. A variety of related salts are known including calcium ammonium nitrate decahydrate and calcium potassium nitrate decahydrate.

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WordNet 2.0 Dictionary

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1. the mineral form of calcium nitrate
(hypernym) mineral

Webster's Revised Unabridged Dictionary (1913)

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Nitrate of calcium, a substance having a grayish white color, occuring in efforescences on old walls, and in limestone caves, especially where there exists decaying animal matter.

Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About

Mineralogy Database Dictionary

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General Information:
 Chemical Formula:
(Molecular Weight = 236.15 gm)
Calcium 16.97 % Ca
Hydrogen 3.41 % 
Nitrogen 11.86 % 
Oxygen 67.75 % 
 Empirical Formula:
Physical Properties:
[???] Perfect
gray, gray white, or white.
Massive - Uniformly indistinguishable crystals forming large masses., ,
1-2 - Between Talc and Gypsum
Vitreous (Glassy)
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