К минералам

RRUFF #797

Afwillite

Элементы:CaSiOH
Valence:CaSiOH

Химия

IMA chemistry:
Ca3[SiO4][SiO2(OH)2]·2H2O
Valence chemistry:
Ca3(SiO4)(SiO2(OH)2)·2H2O

Классификация

Crystal systems:
triclinic, monoclinic
Space groups:
Cc, P1
Structural group:
Spurrite-Afwillite
IMA status:
Approved, Grandfathered

Происхождение

Country:
South Africa
Published:
1925
Oldest age Ma:
2400
Paragenetic modes:
Abiotic, Biotic, Secondary, Stage 4a: Earth's earliest continental crust, PM31 - Contact metamorphism, Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere, PM51 - Pyrometamorphic minerals

Примечания

Parry J, Wright F E (1925) Afwillite, a new hydrous calcium silicate, from Dutoitspan mine, Kimberley, South Africa. Mineralogical Magazine 20, 277-285