[Chemical composition] The same type of the same type of mixed substances mainly include Pb, Cu, Sb and Se. [Crystal structure] orthorhombic system; [Form] The crystal form is often long column-shaped to needle-like, and the crystal faces are mostly longitudinal, and the aggregates are dense in shape (Fig. L-15). Figure L-15 stibnite aggregate [Physical properties] microstrip lead white gray tin; mottled yellow or surfaces of constant current Qiang color; gray streak lead; metallic luster; opaque. Cleavage parallel {010} complete. Hardness 2 to 2.5. The relative density is 6.8. [genesis and occurrence] are mainly found in tungsten-tin high-temperature hydrothermal deposits and contact metasomaties. [Identification characteristics] Similar to stibnite, the color is lighter than that of stibnite, the gloss is strong, the relative density is large, there is no horizontal grain on the cleavage surface, and it does not react with KOH solution. [Main use] is an important ore mineral of bismuth.
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The selection of sealed nylon cage is crucial to KA bearing with one or double seals, while the material of nylon cage must be pure and has enough toughness and strength, because the cage will get very soft if it is made of bad material or mixed material, thus to make no anti-stuck performance within the bearing. To get safety certificate for coal mining products must use nylon cage bearing.
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characteristics
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Center. mine standard in China.
5. Good toughness and strength, good anti-seize performance, constantly used in dusty environment and underground environment.
Main Products:
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a 0 =1.113 nm, b 0 =1.127 nm, c 0 =0.397 nm; Z=4. Structure Bismuthinite and stibnite and so on.
Ism é“‹ Mine (Bismuthinite)
Bi 2 S 3