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Calomel is a mercury chloride mineral with formula Hg2Cl2 (see mercury(I) chloride). It was used as a medicine from the 16th to early 20th century, despite frequently causing mercury poisoning in patients.
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mercury used century doses form effects sublimation mineral patients formula medicine system high first medical taken physicians often early chloride
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Calomel | Birefringence | δ = 0.683 | 1.00 | infobox |
| Calomel | Category | Halide mineral | 1.00 | infobox |
| Calomel | Cleavage | Good on {110}, uneven to imperfect on {011} | 1.00 | infobox |
| Calomel | Color | Colorless, white, grayish, yellowish white, yellowish grey to ash-grey, brown | 1.00 | infobox |
| Calomel | Crystal class | Ditetragonal dipyramidal 4/mmm (4/m 2/m 2/m) - | 1.00 | infobox |
| Calomel | Crystal habit | Crystals commonly tabular to prismatic, equant pyramidal; common as drusy crusts, earthy, massive. | 1.00 | infobox |
| Calomel | Crystal system | Tetragonal | 1.00 | infobox |
| Calomel | Diaphaneity | Transparent to translucent | 1.00 | infobox |
| Calomel | Formula | (Hg2)2+Cl2 | 1.00 | infobox |
| Calomel | Fracture | Conchoidal | 1.00 | infobox |
| Calomel | IMA symbol | Clo | 1.00 | infobox |
| Calomel | Luster | Adamantine | 1.00 | infobox |
| Calomel | Mohs scale hardness | 1.5 | 1.00 | infobox |
| Calomel | Optical properties | Uniaxial (+); very high relief | 1.00 | infobox |
| Calomel | Pleochroism | Weak, E > O | 1.00 | infobox |
| Calomel | Refractive index | nω = 1.973 nε = 2.656 | 1.00 | infobox |
| Calomel | Specific gravity | 7.5 | 1.00 | infobox |
| Calomel | Strunz classification | 3.AA.30 | 1.00 | infobox |
| Calomel | Tenacity | Sectile | 1.00 | infobox |
| Calomel | Twinning | Contact and penetration twins on {112} | 1.00 | infobox |
| Calomel | Ultraviolet fluorescence | Brick-red under UV | 1.00 | infobox |
| Calomel | Unit cell | a = 4.4795(5) Å, c = 10.9054(9) Å; Z=4 | 1.00 | infobox |
| Calomel | is a | mercury chloride mineral with formula Hg2Cl2 | 0.90 | text |
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