Afwillite - Wikipedia
Afwillite is a calcium hydroxide nesosilicate mineral with formula Ca 3 (SiO 3 OH) 2 ·2H 2 O. It occurs as glassy, colorless to white prismatic monoclinic crystals. Its Mohs scale hardness is between 3 and 4.
Afwillite: Mineral information, data and localities. - mindat.org
Afwillite mineral data, information about Afwillite, its properties and worldwide locations.
Afwillite - Wikiwand
Afwillite is a calcium hydroxide nesosilicate mineral with formula Ca 3 (SiO 3 OH) 2 ·2H 2 O. 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.
Afwillite Mineral Data
Afwillite. Comments: Crystallized afwillite prisms. Location: Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Crystal size 1.5 mm. © John Veevaert. Afwillite Crystallography. Axial Ratios: a:b:c =2.0822:1:2.393. Cell Dimensions: a = 11.39, b = 5.47, c = 13.09, Z = 4; beta = 98.433° V = 806.73 Den (Calc)= 2.82.
Basic mechanisms of afwillite seeding for acceleration of …
Jun 1, 2020 · Afwillite is a crystalline calcium silicate hydrate (3CaO·2SiO 2 ·3H 2 O) that can be used for the acceleration of tricalcium silicate hydration. Experimental data was recorded in this study to shed further light on the basic mechanisms for this acceleration effect.
Afwillite – Occurrence, Properties and Distribution
Afwillite is a product formed during the metamorphism of limestones. It is often associated with minerals such as natrolite, merwinite, ettringite, brucite, calcite, foshagite, portlandite and hillebrandite.
Afwillite
Afwillite is a calcium hydroxide nesosilicate mineral with formula Ca 3 Si 2 O 4 (OH) 6. It occurs as glassy, colorless to white prismatic monoclinic crystals. Its Mohs scale hardness is 4.5. It occurs as an alteration mineral in contact metamorphism of limestone.
Afwillite Ca3(SiO3OH)2 22H2O. Crystal Data: Monoclinic. Point Group: m: Crystals prismatic, elongated and striated. k [010], to 11 cm, many tabular on f100g and f201g; in radial ̄brous spherulites; massive. Physical Properties: Cleavage: Perfect on f101g; good on Fracture: Conchoidal. Tenacity: Brittle.
Afwillite - Wikiwand
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.
The thermal decomposition of afwillite | Mineralogical magazine …
The mineral afwillite is one of the hydrated calcium silicates which are found in set cements. It has the empirical formula 3CaO.2SiO 2.3H 2 0; a recent determination of the structure by Megaw (in press) has shown that the structural formula is Cas(SiO 3 OH) 2. 2H 2 O, the hydroxyl groups being linked directly to silicon atoms. When afwillite ...
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