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Afwillite

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Afwillite
Afwillite is a calcium hydroxide nesosilicate mineral with formula Ca3(SiO3OH)2·2H2O. It occurs as glassy, colorless to white prismatic monoclinic crystals. Its Mohs scale hardness is between 3 and 4. It occurs as an alteration mineral in contact metamorphism of limestone. It occurs in association with apophyllitenatrolitethaumasite, merwinite, spurritegehleniteettringiteportlandite, hillebrandite, foshagite, brucite and calcite.

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Mineralogy Database Dictionary

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Afwillite

General Information:
 Chemical Formula:
Ca3Si2O4(OH)6
 Composition:
(Molecular Weight = 342.45 gm)
Calcium 35.11 % Ca
Silicon 16.40 % Si
Hydrogen 1.77 % 
Oxygen 46.72 % 
 Empirical Formula:
Ca3(Si2O4)(OH)6
 Environment:
Alteration product of spurrite.
 Locality:
TL: Dutoitspan diamond mine at Kimberly, South Africa.
Physical Properties:
 Cleavage:
[001] Perfect, [???] Distinct
 Color:
colorless or white.
 Density:
2.62
 Diaphaniety:
Transparent to Subtransparent to translucent
 Habits:
Massive - Uniformly indistinguishable crystals forming large masses., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
 Hardness:
3 - Calcite
 Luster:
Vitreous (Glassy)
 Streak:
white
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Dizionario inglese-italiano 1.0.012

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AFWILLITE
AFWILLITE

Glosarium Pusat Bahasa Depdiknas Indonesia

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afwillite
B: (Kimia) kalsium silikat terhidrasi; afwilit

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