AM_Piypite_1
Formula: Na4.26 Cu4.37 S4 O18 Cl
Name: Piypite
Unit cell: 18.451 18.451 4.952 90.0 90.0 90.0 , V=1685.86
Space group: P14/N1 (1)

Kahlenberg V , Piotrowski A , Giester G , Mineralogical Magazine , 64 (2000) p.1099-1108, Crystal structure of Na4[Cu4O2(SO4)4]*MeCl (Me: Na, Cu, vac) - the synthetic, Na-analogue of piypite (caratiite)