AM_Macdonaldite Formula: Ba Ca4 Si16 O48.4 H24 Name: Macdonaldite Unit cell: 14.081 13.109 23.56 90.0 90.0 90.0 , V=4348.89 Space group: CMCM (63)

Cannillo E , Rossi G , Ungaretti L , Atti della Accademia Nazionale dei Lincei , 45 (1968) p.399-414, The crystal structure of macdonaldite, Locality: Fresno County, California, USA, Note: x(Si4) corrected