AM_Cuspidine_1
Formula: (Ca1.005 Na.995) P F O3.5
Name: Cuspidine
Unit cell: 10.873 10.5516 7.4287 90.0 109.74 90.0 , V=802.19
Space group: P121/N1 (14)

Piotrowski A , Kahlenberg V , Fischer R X , American Mineralogist , 85 (1999) p.1534-1539, Na2Ca2(P2O7)F2, the first diphosphate of the cuspidine family, Sample: split position O1