Barytocalcite and barite pseudomorphs after it

Abstract

Despite a long line of first-class researchers of this mineral, starting with Brooke who studied this mineral in 1824, its crystallization, specifically, the correct orientation of its crystals, has hitherto encountered significant difficulties. I can now make use for this purpose of an excellent specimen from Alston Moor, available in the Museum of the Mining Institute, from which hundreds of crystals suitable for this purpose could be extracted. I extracted 15 crystals and subjected them to comprehensive measurement on a universal goniometer.

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