AM_Tainiolite Formula: K.967 (Mg2.034 Li.966) Si4 O10 F2 Name: Tainiolite Unit cell: 5.231 9.065 10.14 90.0 99.86 90.0 , V=473.73 Space group: C12/M1 (12)

Toraya H , Iwai S , Marumo F , Hirao M , Zeitschrift fur Kristallographie , 146 (1977) p.73-83, The crystal structure of taeniolite, KLiMg2Si4O10F2, Note: this is the 1M polytype, Locality: synthetic