Makarochkinite Mineral Data

General Makarochkinite Information
Chemical Formula:	Ca2Fe++4Fe+++TiSi4BeAlO20
Composition:	Molecular Weight = 871.54 gm
	Sodium 0.66 % Na 0.89 % Na₂O
	Calcium 7.54 % Ca 10.55 % CaO
	Magnesium 0.70 % Mg 1.16 % MgO
	Tantalum 0.15 % Ta 0.18 % Ta₂O₅
	Titanium 3.35 % Ti 5.59 % TiO₂
	Manganese 0.82 % Mn 1.06 % MnO
	Beryllium 0.94 % Be 2.61 % BeO
	Niobium 0.41 % Nb 0.58 % Nb₂O₅
	Aluminum 1.67 % Al 3.16 % Al₂O₃
	Iron 32.62 % Fe 29.92 % FeO / 13.38 % Fe₂O₃
	Silicon 14.44 % Si 30.89 % SiO₂
	Oxygen 36.72 % O
	______ ______
	100.00 % 99.96 % = TOTAL OXIDE
Empirical Formula:	Ca_1.64Na_0.25Mn²⁺_0.11Fe²⁺_3.56Fe³⁺_1.46Ti_0.61Mg_0.25Mn²⁺_0.02Nb_0.03Ta_0.007Si_4.48Be_0.91 Al_0.54Fe²⁺_0.07O₁₈O₂
Environment:	Occurs in a granitic pegmatite near Lake Ishkul. Aenigmatite group. Ti analog of hogtuvaite.
IMA Status:	Approved IMA 2003 (Dana # Added)
Locality:	Ilmen Mountains (Southern Urals), Ilmen State Reserve, Chelyabinsk Oblast, Russia. Link to MinDat.org Location Data.
Name Origin:	Named for Boris A. Makarochkin (1907-1988), Russian chemist and mineralogist, who studied the rare minerals from the Ilmen Mountains and collected the mineral, but described it as a n amphibole
Synonym:	ICSD 39333
	IMA2002-009a
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