pyroaurite

pyroaurite

[¦pī·rō′ȯ‚rīt]
(mineralogy)
Mg6Fe2(OH)16·CO3·4H2O A goldlike or brownish rhombohedral mineral composed of hydrous basic magnesium iron carbonate.
References in periodicals archive ?
Considerable work by Moreland and Padget (5) have shown that this dark layer is a member of the mineralogical group known as pyroaurite.
We found pyroaurite at Ightem again in late 2005, as small hexagonal plates (XRD analysis by Paolo Orlandi, Pisa).
Traces of brucite were disclosed by XRD in altered serpentinite, with palygorskite, stevensite and pyroaurite.
Palygorskite occurs as fine-grained white material intergrown with pyroaurite, stevensite and brucite in altered serpentinite.
Pyroaurite occurs as fine-grained white material intergrown with playgorskite, stevensite and brucite in altered serpentinite.
Saponite occurs as fine-grained white material intergrown with pyroaurite, palygorskite and brucite in altered serpentinite.
The supergene mineralogy is buffered by the presence of small amounts of pre-existing (predominantly alkalin e) phases, including brucite, pyroaurite, palygorskite, dypingite and magnesite.
1980) La comblainite, nouveau mineral du groupe de ia pyroaurite.
1981) Hydrohonessite - a new hydrated Ni-Fe hydroxyl-sulphate mineral; its relationship to honessite, carrboydite, and minerals of the pyroaurite group.
1981) Hydrohonessite--a new hydrated Ni-Fe hydroxy-sulphate mineral; its relationship to honessite, carrboydite and minerals of the pyroaurite group.