Heulandite

General Information: Chemical Formula:(Na,Ca)2-3Al3(Al,Si)2Si13O36·12(H2O) Composition:(Molecular Weight = 1,278.30 gm)Calcium 3.14 % CaAluminum 6.33 % AlSilicon 28.56 % SiHydrogen 1.89 % H Oxygen 60.08 % O  Empirical Formula: CaAl3Si13O36·12(H2O) Environment:Low temperature zeolite found in a wide variety of geologic environments: volcanic rocks, metamorphic rocks, pegmatites, tuffs, and deep-sea sediments. IMA Status:Approved IMA Locality:Glasgow, Strathclyde (Dumbartonshire), Scotland. Name Origin:Named after the English mineral collector, John Henry Heuland (1778-1856), a British mineral collector and dealer.Physical Properties: Cleavage:[010] Perfect Color:white, reddish white, grayish white, brownish white, or yellow. Density:2.2 Diaphaniety:Transparent to subtranslucent Habits:Tabular - Form dimensions are thin in one direction., Crystalline - Coarse - Occurs as well-formed coarse sized crystals., Hardness:3-3.5 - Calcite-Copper Penny Luminescence:None. Luster:Vitreous - Pearly Streak:whiteMore details...

General Information: Chemical Formula:Co+++O(OH) Composition:(Molecular Weight = 91.94 gm)Cobalt 64.10 % CoHydrogen 1.10 % H Oxygen 34.80 % O  Empirical Formula: CoO(OH) IMA Status:Approved IMAPhysical Properties: Cleavage:[0001] Good Color:black or steel gray. Density:4.3 Diaphaniety:Opaque Hardness:3-4 - Calcite-Fluorite Luster:Metallic Streak:blackMore details...

General Information: Chemical Formula:Co+++O(OH) Composition:(Molecular Weight = 91.94 gm)Cobalt 64.10 % CoHydrogen 1.10 % H Oxygen 34.80 % O  Empirical Formula: CoO(OH) IMA Status:Approved IMAPhysical Properties: Cleavage:[0001] Good Color:black or steel gray. Density:4.3 Diaphaniety:Opaque Hardness:3-4 - Calcite-Fluorite Luster:Metallic Streak:blackMore details...

General Information: Chemical Formula:Co+++O(OH) Composition:(Molecular Weight = 91.94 gm)Cobalt 64.10 % CoHydrogen 1.10 % H Oxygen 34.80 % O  Empirical Formula: CoO(OH) IMA Status:Approved IMAPhysical Properties: Cleavage:[0001] Good Color:black or steel gray. Density:4.3 Diaphaniety:Opaque Hardness:3-4 - Calcite-Fluorite Luster:Metallic Streak:blackMore details...

General Information: Chemical Formula:Co+++O(OH) Composition:(Molecular Weight = 91.94 gm)Cobalt 64.10 % CoHydrogen 1.10 % H Oxygen 34.80 % O  Empirical Formula: CoO(OH) IMA Status:Approved IMAPhysical Properties: Cleavage:[0001] Good Color:black or steel gray. Density:4.3 Diaphaniety:Opaque Hardness:3-4 - Calcite-Fluorite Luster:Metallic Streak:blackMore details...

(Na,Ca)2-3Al3(AlSi2)Si13O36 12(H2O)