reevesite

reevesite

[′rēv‚zīt]
(mineralogy)
Na6Fe2(OH)16(CO3)·4H2O Hydrous oxide mineral known only in meteorites.
References in periodicals archive ?
Light yellowish-green flakes of reevesite occur within the serpentinite adjoining the silica-carbonate rock of the Clear Creek mine.
This former nickel mine is the type locality for heazlewoodite and hellyerite, and the source of many rare minerals, including awaruite, dypingite, retgersite, reevesite, theophrastite and several new, unnamed minerals.
A lemon-yellow crust on serpentine gives an X-ray powder diffraction pattern close to that of reevesite, and qualitative EMPA indicates Ni:Fe approximately 3:1, confirming the composition.
Reevesite is rarer and appears to derive from reaction of carbonate-rich waters with nickel and ferric iron released from the oxidation of awaruite and pentlandite.
There are, however, many minerals in common and the more interesting of these include the secondary minerals: gaspeite, otwayite, reevesite, retgersite and zaratite.
Bish and Livingstone (1981) describe from another locality a citrine-yellow encrusting film associated with chromite consisting of a mixture of reevesite, honessite and hydrohonessite.
1981) The crystal chemistry and paragenesis of honessite and hydrohonessite: the sulphate analogues of reevesite.
Carbonate Zone Minor Phases Rare Phases Upper paratacamite, carrboydite, kambaldaite, annabergite, glaukosphaerite, azurite, lavendulan, hydrohonessite, retgersite, nepouite, nullaginite, pyrolusite, huntite, olivenite, otwayite, aragonite, calcite, pecoraite pharmacosiderite, [+ or -] dolomite reevesite, takovite, widgiemoolthalite Lower paratacamite, dolomite, kambaldaite huntite
Reevesite appears to be a rare mineral at Widgiemooltha.