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Minerals in the Tetragonal crystal system, Trapezohedral class (4 2 2)

Biphosphammite
Cristobalite
Cuprotungstite
Cyrilovite
Fluorowardite
Genkinite
Kamphaugite-(Y)
Manganoquadratite
Maucherite
Retgersite
Saryarkite-(Y)
Ungavaite
Wardite
Zinclipscombite
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Current server date and time: 23rd May 2013 20:58:19
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