AM_Tyrolite_1 Formula: Ca2 Cu9 As4 O38.42 H23.92 Name: Tyrolite Unit cell: 54.52 5.5638 10.4647 90.0 96.432 90.0 , V=3154.36 Space group: C12/C1 (15)

Krivovichev S V , Chernyshov D Y , Dobelin N , Armbruster T , Kahlenberg V , Kaindl R , Tessadri R , Kaltenhauser G , American Mineralogist , 91 (2006) p.1378-1384, Crystal chemistry and polytypism of tyrolite, Sample: Brixlegg, Schwaz, Tyrol, Austria, Note: Tyrolite-2M polytype