| General Information |
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| Chemical Formula | Anthony et al, Handbook of Mineralogy (2001) |
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| Physical Properties of Phosphosiderite |
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| Mohs Hardness | 3.5 to 4Anthony et al, Handbook of Mineralogy (2001) |
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| Specific Gravity | 2.74 to 2.76Anthony et al, Handbook of Mineralogy (2001) |
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| Cleavage Quality | Good,IndistinctAnthony et al, Handbook of Mineralogy (2001) |
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| Fracture | UnevenAnthony et al, Handbook of Mineralogy (2001) |
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| Optical Properties of Phosphosiderite |
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| Refractive Index | 1.692 to 1.739Anthony et al, Handbook of Mineralogy (2001) |
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| Optical Character | Biaxial/-Anthony et al, Handbook of Mineralogy (2001) |
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| Pleochroism | Pale rose-red - carmine-red - colorlessAnthony et al, Handbook of Mineralogy (2001) |
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| Dispersion | Very strongAnthony et al, Handbook of Mineralogy (2001) |
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| Colour |
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| Colour (General) | Peach-blossom-red, reddish violet, reddish purple, yellow-orange, may be dark blue, moss-green to nearly colorless; in transmitted light, typically rose-red to colorless.Anthony et al, Handbook of Mineralogy (2001) |
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| Transparency | Transparent,TranslucentAnthony et al, Handbook of Mineralogy (2001) |
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| Lustre | VitreousAnthony et al, Handbook of Mineralogy (2001) |
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| Crystallography of Phosphosiderite |
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| Crystal System | MonoclinicAnthony et al, Handbook of Mineralogy (2001) |
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| Habit | As crystals, tabular, to stout prismatic, many others, to 2.5 cm. May be radial fibrous, in botryoidal or reniform crusts and massesAnthony et al, Handbook of Mineralogy (2001) |
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| Geological Environment |
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| Where found: | Typically an alteration product of triphylite in zoned complex granite pegmatites; may be a component of soils; replacing bones or shells.Anthony et al, Handbook of Mineralogy (2001) |
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| Further Information |
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| Mineral information: | Phosphosiderite information at mindat.org |
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