English: Illustration from 1911 Encyclopædia Britannica, article BARYTES.
Crystals of barytes are orthorhombic and isomorphous with the strontium and lead sulphates (celestite and anglesite); they are usually very perfectly developed and present great variety of form. The simplest are rhomb-shaped tables (fig. 1) bounded by the two faces of the basal pinacoid (c) and the four faces of the prism (m); the angle between the prism-faces (mm) is 78° 23′, whilst that between c and m is 90°. The mineral has a very perfect cleavage parallel to the faces c and m, and the cleavage surfaces are perfectly smooth and bright. The crystals of prismatic habit represented in figs. 2 and 3 are bounded by the domes d and f and the basal pinacoid c; fig. 4 is a plan of a still more complex crystal.
Date
Source
Encyclopædia Britannica, 1911
Author
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Captions
Crystals of barytes, fig. 1 rhomb-shaped; figs. 2 & 3 primatic and fig. 4 complex crystal
== Summary == {{Information |Description={{en|1=Illustration from 1911 Encyclopædia Britannica, article BARYTES. Crystals of barytes are orthorhombic and isomorphous with the strontium and lead sulphates (celestite and anglesite); they are usually very