AM_Hummerite Formula: V5 O22 K Mg H16 Name: Hummerite Unit cell: 8.8178 10.7236 11.0707 65.789 74.057 71.853 , V=894.13 Space group: P-1 (2)

Hughes J M , Schindler M , Rakovan J F , Cureton F E , The Canadian Mineralogist , 40 (2002) p.1429-1435, The crystal structure of hummerite, K Mg(V5O14).8H2O:, Bonding between the [V10O28] structural units and the, {K2Mg2(H2O)16} interstitial complex