Phillipsite-K Mineral Data

General Phillipsite-K Information
Chemical Formula:	(K,Na,Ca)1-2(Si,Al)8O16•6(H2O)
Composition:	Molecular Weight = 661.10 gm
	Potassium 4.73 % K 5.70 % K₂O
	Sodium 2.43 % Na 3.28 % Na₂O
	Calcium 4.24 % Ca 5.94 % CaO
	Aluminum 11.43 % Al 21.59 % Al₂O₃
	Silicon 22.09 % Si 47.26 % SiO₂
	Hydrogen 1.83 % H 16.35 % H₂O
	Oxygen 53.24 % O
	______ ______
	100.00 % 100.12 % = TOTAL OXIDE
Empirical Formula:	K_0.8Na_0.7Ca_0.7Si_5.2Al_2.8O₁₆•6(H₂O)
Environment:	Common zeolite in volcanic rocks, ore veins, diagenetically altered rhyolitic vitric tuffs, saline lake deposits, and ocean floor sediments. Shows solid solution toward harmotome.
IMA Status:	Approved IMA 1998 (Dana # Added)
Locality:	Capo di Bove, south of Rome, Italy. Link to MinDat.org Location Data.
Name Origin:	Named after William Phillips (1775-1829), English mineralogist and founder of the Geological Society of London. The K-dominant member of the phillipsite series.
Name Pronunciation:	Phillipsite-K + Pronunciation
Synonym:	Abrazite
	Cross stone