Specimen data for Crandallite

A Bob Wilken specimen

Identification method: A semi-quantative polished grain EDS analysis of sample from this specimen indicated a chemistry: CaBa_0.1Al_4.1P_2.9O₁₀ (normalized for one Ca and rounded to nearest 0.1 APFU.)
Crandallite chemistry is: CaAl₃(PO₄)(PO₃OH)(OH)₆    Note, EDS cannot detect H. Crandallite is the closest fit available for the EDS indicated chemistry, but still not a particularly good match.
Dana's System of Mineralogy indicates "Ba, Sr and rare earths may substitute for Ca" in crandallite.

Notes: Earlier Palermo specimens labeled as crandallite have been analyzed to be perhamite.