Franzinite Mineral Data

General Franzinite Information
Chemical Formula:	[(Na,K)30Ca10][Si30Al30O120](SO4)10•2(H2O)
Composition:	Molecular Weight = 5,804.06 gm
	Potassium 6.06 % K 7.30 % K₂O
	Sodium 8.32 % Na 11.21 % Na₂O
	Calcium 6.91 % Ca 9.66 % CaO
	Aluminum 13.95 % Al 26.35 % Al₂O₃
	Silicon 14.52 % Si 31.06 % SiO₂
	Hydrogen 0.07 % H 0.62 % H₂O
	Sulfur 5.52 % S 13.79 % SO₃
	Oxygen 44.66 % O
	______ ______
	100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:	Na₂₁K₉Ca₁₀Si₃₀Al₃₀O₁₂₀(SO₄)₁₀•2(H₂O)
Environment:	In ejected metasomatized pumice blocks, thought to be the product of a syntectic process between a trachytic magma and carbonate rocks at the volcanic vent.
IMA Status:	Approved IMA 1977
Locality:	In Italy, in the Pitigliano quarry, near Grosseto, Tuscany; and at Sacrofano and Ariccia, near Rome, Lazio. Link to MinDat.org Location Data.
Name Origin:	For Marco Franzini, Professor of Mineralogy, University of Pisa, Pisa, Italy.
Name Pronunciation:	Franzinite + Pronunciation
Synonym:	ICSD 89863
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