paravauxite

paravauxite

[¦par·ə′vȯk‚sīt]
(mineralogy)
FeAl2(PO4)2(OH)2·8H2O A colorless mineral composed of hydrous basic iron aluminum phosphate; contains more water than vauxite.
References in periodicals archive ?
Gordon (1897-1952), who first described paravauxite.
Pough recognized the isostructural relationship between gordonite and paravauxite.
The place in question is an entirely landlocked, mountainous, somewhat mysterious-seeming country which boasts a long mining history and has a secure reputation for turning out world-class specimens of--oh, let's see--metallic species (andorite, pyrarygrite, stannite, franckeite, cylindrite), other primary ores (cassiterite, ferberite), and glamorous phosphates (phosphophyl-lite, paravauxite, vivianite, ludlamite) such as we have long admired and lusted after.
In 1948 Burnham offered brazilianite crystals (no doubt from the type locality at Corrego Frio, Brazil) in crystals to 2 inches, priced at $15; pink morganite beryl crystal groups from Brazil; and paravauxite from Llallagua, Bolivia, among many others.
com) was showing off a few matrix slabs--wide, thin pieces of matrix range from 5 to 30 cm across--of hard quartz porphyry thickly coated with powder-blue microcrystals of vauxite, together with sparser microcrystals of paravauxite and metavauxite.
In the March-April article on the Siglo XX mine, Llallagua, Bolivia, the authors (Jaroslav Hyrsl and Alfredo Petrov) mention recent rediscoveries of paravauxite and sigloite in the mine's prolific Contacto vein.
It is the type locality for five mineral species (vauxite, metavauxite, paravauxite, sigloite and jeanbandyite) and has also produced some of the world's best specimens of stannite, cylindrite, monazite, bismoclite, and other species.
Childrenite has been found as druses of pale brown to dark brown, millimeter-size tabular crystals in parallel growth coating fissure surfaces to a half-meter square (Bandy, 1944), and as rosettes of translucent, yellow-orange to zinc-orange tabular crystals encrusting paravauxite (Gordon, 1944).
Perhaps the finest specimen in the display was a diverging spray of 1-inch perfectly terminated paravauxite crystals of pale green color on matrix.
Of particular interest are assemblages such as rose-pink monazite-tourmaline-cassiterite-quartz; complexly twinned red greenockite with wavellite; childrenite with vauxite, paravauxite, and wavellite; wavellite with fluorapatite; and vauxite with metavauxite.
There was a recent find of rather large (for the species) crystals of paravauxite from the Siglo Veinte mine, Llallagua, Bolivia.
Among them paravauxite, montgomeryite-kingsmountite and tinticite should be mentioned.