Realgar
[Chemical composition] The composition is fixed and contains less impurities.
[Crystal structure] monoclinic system; 
a 0 = 0.929 nm, b 0 = 1.353 nm, c 0 = 0.657 nm; β = 106 ° 33'; Z = 16. Molecular structure (Fig. L-19): composed of As 4 S 4 molecules, the four S and four As in the molecule are maintained by a covalent bond phase, and the molecules are linked by molecular bonds. . For As 4 S 4 molecules, where S forms a square, As forms a tetrahedron, and the squares coincide with the center of the tetrahedron. Each S is adjacent to two Ass, and one As is adjacent to two Ss and another As.
Figure L-19 As 4 S 4 molecule in the crystal structure of realgar
(quoted from Pan Zhaoyu et al., 1993)
[Form] It is usually produced in a dense block or soil-like block or a hull-like aggregate. Single crystals are usually small, columnar, short-column or needle-like (Figure L-20) with fine vertical lines on the cylinder (Figure L-21).
Figure L-20 Realgar crystal
(According to Wang Wenkui, produced in Shimen, Hunan, 1994)
Figure L-21 Realgar crystals are clustered
[Physical properties] orange, pale orange streak; adamantyl facets having luster, gloss appears on the cross section of the resin, transparent to semi-transparency. Cleavage parallel {010} complete. Hardness 1.5 to 2. The relative density is 3.6. Crisp. Long-term exposure to light, can be converted into a light orange-red powder.
[genesis and morphogenesis] formation conditions similar to the orpiment, and often symbiotic with the female yellow.
[Identification characteristics] orange-red, streaks are light orange-red, the hardness is similar to that of cinnabar, but the cinnabar strips are bright red and relatively dense.
[Main use] is arsenic and the main ore minerals for the manufacture of various arsenic compounds.
Nowadays, as the use of twist tie becomes more and more extensive, a variety of different twist tie have appeared on the market to meet everyone's daily use.
The twist tie are widely used in Christmas gift factories, electronics factories, wire processing factories, wire and cable, toy factories, festive festivals, stationery, department stores, fresh supermarkets, residential daily use, electrical appliances, connectors and other items.
The main business of our company are: Twist tie, Cable Tie, Nose Wire, Nose Clip, Ear Loop, Face Mask Accessories etc. Please feel free to contact us for more details.
Vegetable Twist Tie,Printed Twist Ties,Vegetable Twist Ties,Vegetable Packing Tie
Dongguan Hongtao Plastic Hardware Co., LTD , https://www.twisttiemanufacturer.com