Dachiardite-Ca Mineral Data

General Dachiardite-Ca Information
Chemical Formula:	(Ca,Na2,K2)5Al10Si38O96•25(H2O)
Composition:	Molecular Weight = 1,792.84 gm
	Cesium 0.82 % Cs 0.86 % Cs₂O
	Potassium 2.01 % K 2.42 % K₂O
	Barium 0.08 % Ba 0.09 % BaO
	Sodium 0.54 % Na 0.73 % Na₂O
	Strontium 0.59 % Sr 0.69 % SrO
	Calcium 3.44 % Ca 4.82 % CaO
	Aluminum 7.31 % Al 13.82 % Al₂O₃
	Iron 0.06 % Fe 0.09 % Fe₂O₃
	Silicon 29.70 % Si 63.54 % SiO₂
	Hydrogen 1.41 % H 12.62 % H₂O
	Oxygen 54.04 % O
	______ ______
	100.00 % 99.67 % = TOTAL OXIDE
Empirical Formula:	Ca_1.54K_0.92Na_0.42Cs_0.11Sr_0.12Ba_0.01Al_4.86Fe³⁺_0.02Si_18.96O₄₈�12.56(H₂O)
Environment:	Hydrothermal zeolite that generally occurs in silica-rich environments in late states of granitic pegmatites and Si-rich basalts. Ca modifier added by zeolite nomenclatrue committee .
IMA Status:	Valid Species (Pre-IMA) 1906
Locality:	Filone della Speranza, Monte Capanne, San Piero di Campo, island of Elba, Tuscany, Italy.. Link to MinDat.org Location Data.
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.
Name Pronunciation:	Dachiardite-Ca + Pronunciation
Synonym:	Achiardite
	Dachiardite
	Svetlozarite - twinned