Name:Shijiazhuang Eternal Building Materials Limited Company
Type:Others
Tel:86-311-83055455
Fax:86-311-83055485
Address:China(Mainland)
Products detail
| Product Name: | Tourmaline |
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| CAS No: | 12197-81-8 | |
| Product Type: | Inorganic Chemicals -> Inorganic mineral | |
| Product spec: | 41% | |
| Packing: | ||
| Post Time: | 2011-01-18 | |
| Usage: | ||
| Description: | The tourmaline is a kind of silicic acid rock mineral. As its Chinese craft name “Bixi”, which means valuable gem, the tourmaline is ranked among the middle level gems, The crystal structure and formation of the tourmaline: trigonal system, compound single pyramid trigonal system, prism crystal; the two ends have different crystal surface. Usually, There are vertical lines on the surface of the prism, and the transect is spherical triangle. The shape of the aggregate is like stick, emanant, or bundle of needles, and sometimes it is dense massive or hidden crystal massive. Generally the tourmaline is contained in the pegmatite, albite, ?lepidolite, and greisen. Usually the tourmaline has the phenomenon of colorful ribbon, with colorless line trace, luster of glass, and cannot be separated into slice. Hardness: 7.0-7.5, possessing brittleness, specific gravity: 3.03-3.25, with piezoelectricity and pyroelectricity, the tourmaline shows no or little fluorescence under the shining of the ultraviolet. The red one may send out feeble purple fluorescence. Under the transmission light of the microscope it will show pleochroism. | |