Massicot
PbOIMA symbol: Msigrandfathered
Massicot is an oxide or hydroxide mineral with the formula PbO, crystallizing in the orthorhombic system. It has a Mohs hardness of 2, typically red or yellow in color, with a dull luster, a specific gravity of 8. Its streak is yellow.
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Crystallography
| Crystal system | orthorhombic crystal systemWikidata (CC0) |
|---|---|
| Space group | P b c m |
| Cell (Å, °) | a = 5.8931, b = 5.4904, c = 4.7528; α = 90, β = 90, γ = 90 |
| Cell volume | 153.779 ų, Z = 4 |
| Axial ratios | 1.0733:1:0.8657calculated from COD 9007710 |
| Source structure | COD 9007710 (Acta Crystallographica, Section C, 1985) |
Powder X-ray diffraction (calculated)
| d (Å) | 3.068 | 2.947 | 2.745 | 1.724 | 1.64 | 2.376 |
|---|---|---|---|---|---|---|
| I/I₀ | 100 | 24.7 | 22.4 | 20.4 | 18.1 | 16.9 |
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9007710; idealized occupancies, no preferred orientation.
Physical properties
| Density (calculated) | 9.641 g/cm³calculated from COD 9007710 |
|---|---|
| Hardness (Mohs) | 2single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Specific gravity | 8 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892) |
| Color | red, yellowsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
| Streak | yellowsingle sourceWikidata (CC0) |
| Luster | dullsingle sourceDana, System of Mineralogy, 6th ed. (1892) |
Chemistry (calculated)
| Molecular weight | 223.2 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Pb 92.83%, O 7.17% |
Classification
| Nickel-Strunz (10th) | 4.AC.25Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 4.AC.25Wikidata (CC0) |
| Dana (8th) | 4.2.7.1Wikidata (CC0) |