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:
white
More 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:
white
More 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 se
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:
white
More details...