File:Barytes 1.png
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Summary
| Description |
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 | Project Gutenberg Distributed Proofreaders |
Licensing
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This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States. |  |
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This image comes from the Project Gutenberg archives. This is an image that has come from a book or document for which the American copyright has expired and this image is in the public domain in the United States and possibly other countries.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:15, 4 April 2022 | | 1,072 × 758 (28 KB) | DivermanAU | tidy image |
| 22:41, 1 December 2008 |  | 1,072 × 758 (12 KB) | Keith Edkins | == 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 |
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