Rondorfite Mineral Data

General Rondorfite Information
Chemical Formula:	Ca8Mg(SiO4)4Cl2
Composition:	Molecular Weight = 782.89 gm
	Sodium 0.06 % Na 0.08 % Na₂O
	Calcium 41.41 % Ca 57.95 % CaO
	Magnesium 2.76 % Mg 4.58 % MgO
	Titanium 0.06 % Ti 0.10 % TiO₂
	Aluminum 0.21 % Al 0.39 % Al₂O₃
	Iron 0.43 % Fe 0.55 % FeO
	Silicon 14.49 % Si 31.01 % SiO₂
	Hydrogen 0.04 % H 0.33 % H₂O
	Chlorine 6.84 % Cl 6.84 % Cl
	- % Cl -1.54 % -O=Cl₂
	Oxygen 33.70 % O
	______ ______
	100.00 % 100.29 % = TOTAL OXIDE
Empirical Formula:	Ca_8.09Na_0.02Mg_0.89Al_0.06Fe²⁺_0.06Si_4.04Ti_0.01O_16.2Cl_1.51(OH)_0.29
Environment:	In xenoliths in leucite tephrite lava.
IMA Status:	Approved IMA 1997 (Dana # Added)
Locality:	A quarry at the Bellerberg volcano lava field, near Ettringen, 2 km north of Mayen, Laacher See region, eastern Eifel area, Germany. Link to MinDat.org Location Data.
Name Origin:	Named for Alice and Eugen Rondorf, two distinguished mineral collectors, who found the mineral with Bernd Ternes in 1979.
Synonym:	IMA1997-013