AM_Tyrolite Formula: Ca2 Cu9 As4 O38 C.76 H24.4 Name: Tyrolite Unit cell: 27.562 5.5682 10.4662 90.0 98.074 90.0 , V=1590.33 Space group: P12/C1 (13)

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-1M polytype