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Vanadiocarpholite (Mn(II)V(III)Al(Si2O6)(OH)4) is straw yellow to brown mineral. It has an orthorhombic crystal system.It consists of:

Manganese 15.56% Mn 20.09% MnO
Aluminum 7.64% Al 14.44% Al2O3
Vanadium 14.43% V 21.23% V2O3
Silicon 15.91% Si 34.04% SiO2
Hydrogen 1.14% H 10.21% H2O
Oxygen 45.32% O

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