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Britannica 11th
Encyclopaedia Britannica · 11th edition
Apophylutb
Britannica 11thAPOPHYLUTB, a mineral often classed with the zeolites, since it behaves like these when heated before the blowpipe and has the same mode of occurrence; it differs, however, from the zeolites proper in containing no aluminium. It is a hydrous potassium and calc ...
Vol. 2, pp. 195-195
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