A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Sal-ammoniac on basalt from Mt. Vesuvius, Italy |
|---|---|
| Description | The white crystals are sal-ammoniac, an ammonium chloride mineral with compostion, NH4Cl. Sal-ammoniac is one of the more common of the ammonium-bearing minerals, all of which are quite rare. It crystallizes from vapors to form precipitates on volcanic rocks near fume releasing vents but is very soluble in water. So, crystals disappear with rain. This specimen is about 3 cm across. |
| Location | Italy. Mt. Vesuvius. |
| Photographer | Darla Sondrol. 2001-03-07. |
| Collection | University of North Dakota Mineralogy Collection #312. |
| Key words | Sal-ammoniac, basalt, Italy, Mt. Vesuvius |
| Tech details | 300 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 188 |
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