childrenite


Also found in: Wikipedia.

childrenite

[′chil·drə‚nīt]
(mineralogy)
(Fe,Mn)AlPO4(OH)2·H2O A pale-yellowish to dark-brown orthorhombic mineral consisting of a hydrous basic iron aluminum phosphate occurring as translucent crystals; it is isomorphous with eosphorite; hardness is 4.5-5 on Mohs scale, and specific gravity is 3.18-3.24.
References in periodicals archive ?
484 Childrenite, G & C mines, Cornwall, England, no.
And there is the matter of associations: Rob's crystal is "naked," but one of Jeff's has a euhedral, pale orange, terminated crystal of childrenite measuring about 3 mm clinging to one side.
Childrenite was identified from the lowest horizons of Trepca in 1983, but this discovery was published much later, when specimens started to appear at the mineral shows (Zorz, 1991; Bermanec et al.
Trusty Jordi Fabre had about 60 small specimens from a September 2006 find of childrenite at a brand-new locality in Brazil: Lavra do Poco Dantas near Taquaral, Minas Gerais.
A few other matrix pieces are studded with pretty, sparkling, dark brown spheres composed of microcrystals of childrenite.
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).
There were 12 bicolored red/green scepter tourmaline crystals of highest quality; brazilianite matrix specimens 30 cm wide; superbly crystallized rose quartz clusters with childrenite rosettes; doubly terminated herderite crystals more than 10 cm long, on matrix; morganite crystals with phantoms; euclase crystals to 6 cm, the smaller ones richly colored.
Associated minerals are: albite, potassic feldspar, roscherite, viitaniemiite, childrenite, quartz, apatite, herderite, elbaite and montmorillonite.
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.
It is probably no coincidence that natural occurrences of rose quartz crystals are usually found associated with phosphate minerals, for example the occurrence of childrenite with the pink quartz crystals from Brazil.
set out to describe every piece, but I'll "label" a few I especially liked which were not pictured in the issue: arsenopyrite/stannite from China (12 x 12 cm); ilvaite/quartz from Dalnegorsk (12 x 15 cm); hambergite from Afghanistan (a transparent blade 7 cm high); childrenite from Afghanistan (a perfect, loose 4.
Summing up their work on Sapucaia phosphates, Lindberg and Pecora (1958) listed their apatite, bermanite, childrenite, gordonite, heterosite, hureaulite, leucophosphite, lipscombite, metastrengite (= phosphosiderite), montebrasite, roscherite, saleeite, strengite, triphylite, variscite and vivianite as having been positively identified, in addition to the new species.
Full browser ?