Formula: Mg3Al4(PO4)4(OH)6.2H2O
Hydrated phosphate containing hydroxyl, forms a series with gormanite
Crystal System: Triclinic
Specific gravity: 3.087 measured, 3.07 calculated
Hardness: 5½ to 6
Streak: Pale green
Colour: Blue-green, dark grey-green
Solubility: Soluble with difficulty in hydrochloric acid
Environments
Pegmatites
Sedimentary environments
Metamorphic environments
Hydrothermal environments
Souzalite occurs as a rare hydrothermal alteration product of
scorzalite in complex zoned
granite pegmatites,
in sedimentary phosphate nodules, and in high-pressure kyanite deposits.
Souzalite is associated with scorzalite
(HOM).
Localities
At the type locality, the Córrego Frio mine, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil, souzalite
is a hydrothermal alteration product of, and more abundant than, scorzalite
in the pegmatite. The mineral assemblage includes
albite, muscovite,
quartz, apatite,
zircon and tapiolite
(AM 33.205).
At Rapid Creek, Dawson mining district, Richardson Mountains, Canada, souzalite occurs with
gormanite
(Dana).
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