Plattnerite
PbO2IMA symbol: Ptngrandfathered
Plattnerite is an oxide or hydroxide mineral with the formula PbO2, crystallizing in the tetragonal system. It has a Mohs hardness of 5-5.5, typically black in color, with a metallic luster, a specific gravity of 8.5. Its streak is brown.
Photos
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Crystallography
| Crystal system | tetragonal crystal systemWikidata (CC0) |
|---|---|
| Space group | P 42/m n m |
| Cell (Å, °) | a = 4.9577, b = 4.9577, c = 3.3879; α = 90, β = 90, γ = 90 |
| Cell volume | 83.27 ų, Z = 2 |
| Axial ratios | 1.0000:1:0.6834calculated from COD 9014175 |
| Source structure | COD 9014175 (Acta Crystallographica, Section B, 1997) — 1 of 12 structures |
Powder X-ray diffraction (calculated)
| d (Å) | 3.506 | 2.797 | 1.855 | 2.479 | 1.485 | 1.525 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 95.6 | 72.3 | 30.1 | 20.3 | 18.6 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9014175; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 9.54 g/cm³calculated from COD 9014175 |
|---|---|
| Hardness (Mohs) | 5-5.5single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 8.5 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | blacksingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | chestnutsingle sourceWikidata (CC0) brownsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Luster | metallicsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 239.2 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Pb 86.62%, O 13.38% |
Classification
| Nickel-Strunz (10th) | 4.DB.05Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 4.DB.05Wikidata (CC0) |
| Dana (8th) | 4.4.1.6Wikidata (CC0) |