Mckelveyite Group

The mckelveyite group includes:

donnayite-(Y): NaSr3CaY(CO3)6.3H2O
ewaldite: Ba(Na,Ca,Y,Ce,K)(CO3)2.2.6H2O
mckelveyite-(Y): NaBa3(Ca,U)Y(CO3)6.3H2O
weloganite: Na2Sr3Zr(CO3)6.3H2O

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