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Phosgenite is a rare mineral consisting of lead carbonate chloride, (PbCl)2CO3. The tetragonal crystals are prismatic or tabular in habit: they are usually colorless and transparent, and have a brilliant adamantine lustre. Sometimes the crystals have a curious helical twist about the tetrad or principal axis. The hardness is 3 and the specific gravity…
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crystals lead mineral also mine carbonate 2co3 tetragonal prismatic hardness sectile name pbcl habit colorless transparent adamantine specific gravity references
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Phosgenite | Birefringence | δ = 0.027 | 1.00 | infobox |
| Phosgenite | Category | Carbonate minerals | 1.00 | infobox |
| Phosgenite | Cleavage | Distinct on {001} and {110}, indistinct on {100} | 1.00 | infobox |
| Phosgenite | Color | Pale yellow to yellowish brown, pale brown, smoky brown, smoky violet, colorless, pale rose, gray, yellowish gray, pale green | 1.00 | infobox |
| Phosgenite | Crystal class | Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m) | 1.00 | infobox |
| Phosgenite | Crystal habit | Short prismatic crystals, granular, massive | 1.00 | infobox |
| Phosgenite | Crystal system | Tetragonal | 1.00 | infobox |
| Phosgenite | Diaphaneity | Transparent to translucent | 1.00 | infobox |
| Phosgenite | Formula | (PbCl)2CO3 | 1.00 | infobox |
| Phosgenite | Fracture | Conchoidal | 1.00 | infobox |
| Phosgenite | IMA symbol | Pho | 1.00 | infobox |
| Phosgenite | Luster | Adamantine | 1.00 | infobox |
| Phosgenite | Mohs scale hardness | 2–3 | 1.00 | infobox |
| Phosgenite | Optical properties | Uniaxial (+); anomalously biaxial if strained | 1.00 | infobox |
| Phosgenite | Pleochroism | Weakly pleochroic with O – reddish and E – greenish in thick sections. | 1.00 | infobox |
| Phosgenite | Refractive index | nω = 2.118 nε = 2.145 | 1.00 | infobox |
| Phosgenite | Solubility | Soluble in dilute nitric acid with effervescence, decomposes slowly in cold water | 1.00 | infobox |
| Phosgenite | Space group | P4/mbm | 1.00 | infobox |
| Phosgenite | Specific gravity | 6.12 – 6.15 | 1.00 | infobox |
| Phosgenite | Streak | White | 1.00 | infobox |
| Phosgenite | Strunz classification | 5.BE.20 | 1.00 | infobox |
| Phosgenite | Tenacity | Sectile, flexible perpendicular to {001} | 1.00 | infobox |
| Phosgenite | Ultraviolet fluorescence | Fluoresces yellow under LW and SW UV | 1.00 | infobox |
| Phosgenite | Unit cell | a = 8.16 Å, c = 8.883(6) Å; Z = 4 | 1.00 | infobox |
| Phosgenite | is a | rare mineral consisting of lead carbonate chloride | 0.90 | text |
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