Dachiardite

General Information: Chemical Formula:(Ca,Na2,K2)5Al10Si38O96·25(H2O) Environment:Hydrothermal zeolite that generally occures in silica-rich environments in late states of granitic pegmatites and Si-rich basalts. Locality:Filne della Speranza, Mte. Capanne, San Piero de Campo, Elba, Italy. Name Origin:Named after Antonio D'Achiardi (1839-1902), Professor of Mineralogy, Universit  di Pisa, Italy, who first described the mineral discovered by his son in a granitic pegmatite.Physical Properties: Cleavage:[100] Perfect, [001] Perfect Color:white, pink, or orange red. Density:2.14 - 2.21, Average = 2.17 Diaphaniety:Transparent to translucent Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Twinning Common - Crystals are usually twinned., Pseudo Octohedral - Crystals show an octohedral outline. Hardness:4-4.5 - Between Fluorite and Apatite Luster:Vitreous - Silky Streak:whiteMore details...

General Information: Chemical Formula:(Ca,Na2,K2)5Al10Si38O96·25(H2O) Environment:Hydrothermal zeolite that generally occures in silica-rich environments in late states of granitic pegmatites and Si-rich basalts. IMA Status:Approved IMA (Dana # Added) Locality:Filone della Speranza, Monte Capanne, San Piero di Campo, island of Elba, Tuscany, Italy.. Name Origin:Named after Antonio D'Achiardi (1839-1902), Professor of Mineralogy, Universit  di Pisa, Italy, who first described the mineral discovered by his son in a granitic pegmatite.Physical Properties: Cleavage:[100] Perfect, [001] Perfect Color:white, pink, or orange red. Density:2.14 - 2.21, Average = 2.17 Diaphaniety:Transparent to translucent Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Twinning Common - Crystals are usually twinned., Pseudo Octohedral - Crystals show an octohedral outline. Hardness:4-4.5 - Between Fluorite and Apatite Luster:Vitreous - Silky Streak:whiteMore details...

General Information: Chemical Formula:(Ca,Na2,K2)5Al10Si38O96·25(H2O) Environment:Hydrothermal zeolite that generally occures in silica-rich environments in late states of granitic pegmatites and Si-rich basalts. IMA Status:Approved IMA (Dana # Added) Locality:Alpe di Siusi, Bolzano, Italy. Name Origin:Named after Antonio D'Achiardi (1839-1902), Professor of Mineralogy, Universit  di Pisa, Italy, who first described the mineral discovered by his son in a granitic pegmatite. The Na -dominant member of the dachiardite sePhysical Properties: Cleavage:[100] Perfect, [001] Perfect Color:white, pink, or orange red. Density:2.14 - 2.21, Average = 2.17 Diaphaniety:Transparent to translucent Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Twinning Common - Crystals are usually twinned., Pseudo Octohedral - Crystals show an octohedral outline. Hardness:4-4.5 - Between Fluorite and Apatite Luster:Vitreous - Silky Streak:whiteMore details...