Mendipite
Pb3O2Cl2IMA symbol: Mdigrandfathered
Mendipite is a halide mineral with the formula Pb3O2Cl2, crystallizing in the orthorhombic system. It has a Mohs hardness of 2.5-3, typically white, blue, red or yellow in color, with an adamantine or pearly luster, a specific gravity of 6. Its streak is white.
Photos
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Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P n m a |
| Cell (Å, °) | a = 11.879, b = 5.808, c = 9.505; α = 90, β = 90, γ = 90 |
| Cell volume | 655.781 ų, Z = 4 |
| Axial ratios | 2.0453:1:1.6365calculated from COD 9005510 |
| Source structure | COD 9005510 (European Journal of Mineralogy, 2001) |
Powder X-ray diffraction (calculated)
| d (Å) | 2.644 | 2.781 | 3.514 | 2.904 | 3.042 | 2.101 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 91 | 87.3 | 81.7 | 75.4 | 73 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9005510; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 7.338 g/cm³calculated from COD 9005510 |
|---|---|
| Hardness (Mohs) | 2.5-3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 6 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | blue, red, white, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | whitesingle sourceWikidata (CC0) whitesingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | adamantine, pearlysingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 724.5 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Pb 85.8%, O 4.42%, Cl 9.79% |
Classification
| Nickel-Strunz (10th) | 3.DC.70Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 3.DC.70Wikidata (CC0) |