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Formula: [Mg8Cu12(PO4)(CO3)4(OH)24(H2O)20][(H0.33SO4)3(H2O)36]
Sulphate, contains a novel
[Mg8Cu12(PO4)(CO3)4(OH)24(H2O)20]5+
polyoxometalate cation
Crystal System: Isometric
Specific gravity: 1.98 measured
Hardness: 2½
Streak: Pale blue
Colour: Blue to greenish blue
Luminescence:
Solubility: Soluble with mild effervescence in dilute hydrochloric acid at room temperature
Environments
Metamorphic environments
Hydrothermal environments
Ramazzoite is a relatively new mineral, approved in 2017 and to date (February 2024) reported only from the
type locality.
Localities
At the type locality, the Mt. Ramazzo Mine, Borzoli, Genoa, Genoa, Liguria, Italy, ramazzoite occurs as
a late-stage, secondary mineral crystallising from
low-temperature, aqueous solutions hosted in
serpentinite in contact with
basalt dikes and pillow lavas. It occurs on
magnetite-rich matrix in association with
chlorartinite, chrysotile,
dypingite, goethite,
lepidocrocite and
nesquehonite. Ramazzoite forms as simple cubes up to about
0.15 mm on edge; it is blue to greenish-blue with a vitreous to oily lustre and pale blue streak
(EJM 30: 827–834, HOM).
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