Alumoakermanite Mineral Data

General Alumoakermanite Information
Chemical Formula:	(Ca,Na)2(Al,Mg,Fe++)(Si2O7)
Composition:	Molecular Weight = 268.84 gm
	Sodium 4.28 % Na 5.76 % Na₂O
	Calcium 22.36 % Ca 31.29 % CaO
	Magnesium 2.71 % Mg 4.50 % MgO
	Aluminum 6.02 % Al 11.38 % Al₂O₃
	Iron 2.08 % Fe 2.67 % FeO
	Silicon 20.89 % Si 44.70 % SiO₂
	Oxygen 41.66 % O
	______ ______
	100.00 % 100.30 % = TOTAL OXIDE
Empirical Formula:	Ca_1.5Na_0.5Al_0.6Mg_0.3Fe²⁺_0.1(Si₂O₇)
Environment:	Found in evolved olivine free melilite-nephelinitic ashes and lapilli-tuffs as a silicate phase in non-carbonatite lavas. Melilite group. Al-dominant analogue of �kermanite.
IMA Status:	Proposed IMA 2008 (Dana # Added)
Locality:	Oldoinyo Lengai volcano, Tanzania Link to MinDat.org Location Data.
Name Origin:	Named as the Al analog of akermanite.
Synonym:	IMA2008-049