A popular guide to minerals - with chapters on the Bement Collection of minerals in the American Museum of Natural History, and the development of mineralogy (1912) (14755179336)

Identifier: popularguidetomi00grat (find matches)
Title: A popular guide to minerals : with chapters on the Bement Collection of minerals in the American Museum of Natural History, and the development of mineralogy
Year: 1912 (1910s)
Authors: Gratacap, L. P. (Louis Pope), 1851-1917
Subjects: American Museum of Natural History. Bement Collection of Minerals Mineralogy
Publisher: New York : D. Van Nostrand
Contributing Library: Robarts - University of Toronto
Digitizing Sponsor: University of Toronto



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< §1 DEVELOPMENT OF MINERALOGY 247 the connection of crystalline form with chemical composition, foras A. E. Tutton observed, it can no longer be doubted that thephenomenon of a single chemical substance crystallizing in morethan one crystalline form depends essentially upon a different con-stitution of the crystal element, the physical molecule, whether thedifference is in the number or the arrangement of the chemicalmolecules of which it is composed. About this time L. Michel made artificial Pozvellite and C.Friedel, succeeded in producing Percylite, Ctimengeite, Boleite, andH. A. Miers in 1896 published an admirable paper on British Pseudo-morphs, hitherto undescribed. The list has definite generalized in-terest and illustrate lines and fields of the enlarging examinationsof mineralogical science; the mimicries recorded were, apatite aftercronstedtite, calcite after quartz, calcite after celestite, cerussiteafter lanarkite, chalcopyrite after calcite, chalcopyrite after bis-mut