AM_Cuspidine_2
Formula:
(Na Ca2) Lu Si2 O7 F2
Name:
Cuspidine
Unit cell:
11.024 10.303 7.391 90.0 109.4 90.0 , V=791.81
Space group:
P121/A1 (14)
Fleet M E , Pan Y , The Canadian Mineralogist , 33 (1995) p.879-884, The structure of NaCa2LuSi2O7F2, a synthetic phase of the cuspidine group