AM_Protopyroxene
Formula: (Mg1.54 Sc.23) Li.23 Si2 O6
Name: Protopyroxene
Unit cell: 9.2554 8.765 5.3333 90.0 90.0 90.0 , V=432.66
Space group: PBCN (60)

Yang H , Finger L W , Conrad P G , Prewitt C T , Hazen R M , American Mineralogist , 84 (1999) p.245-256, A new pyroxene structure at high pressure: Single-crystal X-ray and Raman study