##NAMES=Bobdownsite ##RRUFFID=R050109 ##IDEAL CHEMISTRY=Ca_9_Mg(PO_4_)_6_(PO_3_F) ##LOCALITY=Big Fish River, Yukon Territory, Canada ##OWNER=RRUFF ##SOURCE=Rock Currier ##DESCRIPTION=Colorless hexagonal tabular crystals, type sample ##STATUS=The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis. ##URL=rruff.info/R050109 ##MEASURED CHEMISTRY=(Ca_8.76_Na_0.24_)_Σ=9_(Mg_0.72_Fe^3+^_0.13_Al_0.11_Fe^2+^_0.04_)_Σ=1_(P_1.00_O_4_)_6_(P_1.00_O_3_F_1.00_); Fe^2+^ and Fe^3+^ by charge balance 5.014013e+001, 2.605349e-002 5.206860e+001, 2.658821e-002 5.399707e+001, 2.096036e-002 5.592553e+001, 2.233786e-002 5.785400e+001, 2.548537e-002 5.978246e+001, 3.318536e-002 6.171093e+001, 3.143344e-002 6.363940e+001, 3.106686e-002 6.556786e+001, 3.241697e-002 6.749633e+001, 3.373168e-002 6.942480e+001, 3.202731e-002 7.135326e+001, 3.660079e-002 7.328172e+001, 3.588436e-002 7.521019e+001, 3.452380e-002 7.713866e+001, 3.703425e-002 7.906712e+001, 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