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Babefphite
Babefphite is a rare phosphate mineral with the general formula BaBe(PO4)(F,OH). The name is given for its composition (Ba meaning barium, Be meaning beryllium, F meaning fluorine, and P for phosphorus).〔Fleischer, M (1966) New mineral names. American Mineralogist, 51, 1546-1553.〕 ==Crystallography== Babefphite is tetragonal, which means crystallographically, it contains two horizontal and interchangeable equal axes (a1 and 2) and a longitudinal axis (c). It belongs to the 4/m 2/m 2/m point group; meaning it has four horizontal axes of twofold symmetry, two of which coincide with the crystallographic axes (a1) and (a2) and the remaining two at 45° to the (a1) and (a2).〔Klein, C., and Dutrow, B. (2007) The 23rd edition of the Manual of Mineral Science,675p. John Wiley and Sons,Inc. Hoboken, New Jersey, U.S.A.〕〔Wintringham, J.P. (1917) An Elementary Introduction to Crystallography. American Mineralogist, 2, 109-110.〕
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