overite

overite

[′ō·və‚rīt]
(mineralogy)
Ca3 Al8(PO4)8(OH)6·15H2O A mineral composed of hydrous basic calcium aluminum phosphate.
References in periodicals archive ?
The mine is also the type locality for the phosphates englishite, gordonite, millisite, montgomeryite, overite and wardite.
Larsen (1942b) made a detailed study of the paragenetic relationships in the evolution of variscite nodules in the Clay Canyon deposit, identifying six stages: (1) variscite formation, followed by fracturing and the introduction of thin black quartz veinlets; (2) banded minerals, primarily crandallite, millisite and wardite, replacing and enclosing variscite while opening up cavities through shrinkage (some variscite nodules were entirely replaced by crandallite); (3) formation of free-growing crystals of gordonite, englishite, montgomeryite and probably overite and kolbeckite in cavities; (4) a minor reversion to crandallite formation from solution as isolated oolites; (5) apatite-group minerals; and finally (6) the limonitic phase (limonite is not present inside any of the nodules).
They are usually bright green to blue-green (rarely pale green to colorless) and, like overite, are flattened on {010} with perfect cleavage on {010}, elongation parallel to [001 J, and a tendency toward parallel growth.
Overite is among the rarest of the crystallized minerals in the Clay Canyon variscite nodules, a fact that hindered initial descriptions.
Among them were two new species ultimately named in their honor: overite and montgomeryite.
The scandium-dominant analog of overite and segelerite