AM_Stibiocolumbite Formula: Sb (Nb.33 Ta.67) O4 Name: Stibiocolumbite Unit cell: 5.557 4.932 11.808 90.0 90.0 90.0 , V=323.62 Space group: PNA21 (33)

Zubkova N V , Pushcharovsky D Y , Giester G , Smolin A S , Tillmanns E , Brandstatter F , Hammer V , Peretyazhko I S , Sapozhnikov A N , Kashaev A A , Neues Jahrbuch fur Mineralogie, Monatshefte , 2002 (2002) p.145-159, Bismutocolumbite, Bi(Nb.79Ta.21)O4, stibiocolumbite, Sb(Nb.67Ta.33)O4 and their, structural relation to the other ABO4 minerals with, stibiotantalite (SbTaO4) structure, Locality: Mesa Grande, California, USA