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Published online by Cambridge University Press: 14 March 2018
In dana's System of Mineralogy, 5th Edition, 1883, page 747, the following description of this substance is given :—" Crystallisable in needles; butter-like in consistence; colour, white; melting point of impure native material, 47°, Brazier; but of material after solution in alcohol, 51°, Luck ; 52°-52°· Brazier ; easily soluble in alcohol or ether."