Zeophyllite Mineral Data

General Zeophyllite Information
Chemical Formula:	Ca4Si3O8(OH,F)4•2(H2O)
Composition:	Molecular Weight = 556.77 gm
	Sodium 0.41 % Na 0.56 % Na₂O
	Calcium 30.23 % Ca 42.30 % CaO
	Aluminum 0.97 % Al 1.83 % Al₂O₃
	Silicon 15.64 % Si 33.45 % SiO₂
	Hydrogen 2.24 % H 20.06 % H₂O
	Oxygen 43.68 % O
	Fluorine 6.82 % F 6.82 % F
	- % F -2.87 % -O=F₂
	______ ______
	100.00 % 102.16 % = TOTAL OXIDE
Empirical Formula:	Ca_4.2Na_0.1Si_3.1Al_0.2O₉F₂•6.2(H₂O)
Environment:	Secondary mineral from hydrothermal alteration of basalt.
IMA Status:	Valid Species (Pre-IMA) 1902
Locality:	Litomerice (Leitmeritz), Brezno and Labem (Gross-Priesen), Radejcin (Radzein), and Teplice (Teplitz), Czech Republic. Link to MinDat.org Location Data.
Name Origin:	From the Greek "to boil" and "a leaf", in allusion to its habit.
Name Pronunciation:	Zeophyllite + Pronunciation
Synonym:	Foshallasite
	ICSD 85124
	PDF 35-715