Table 1.

Classification of stoichiometric perovskites ABX3 and A2BBX6.

Group/subgroupCompositionIdealSp. gp.Tilt
Single perovskites ABX3
Bridgmanite subgroup
 Bridgmanite(Mg,Fe)SiO3MgSiO3Pbnmaac+
 Unnamed?CaSiO3?
Perovskite subgroup
 BarioperovskiteBaTiO3BaTiO3Amm2*aoaoao
 Isolueshite(Na,La,Ce)(Nb,Ti)O3(Na,La)NbO3PmEmbedded Imagemaoaoao
 Lakargiite(Ca)(Zr,Sn,Ti)O3CaZrO3Pbnmaac+
 Loparite(Na,REE,Ca,Sr,Th) (Ti,Nb)O3(Na,REE)Ti2O6Pbnmaac+
 Lueshite(Na,REE,Ca)(Nb,Ti)O3NaNbO3Pmmn
 Macedonite(Pb,Bi)TiO3PbTiO3P4mm*(?)aoaoao
 Megawite(Ca)(Sn,Zr,Ti)O3CaSnO3Pbnmaac+
 Perovskite(Ca,REE,Na)(Ti,Nb)O3CaTiO3Pbnmaac+
 Tausonite(Sr,Ca,REE,Na)(Ti,Nb)O3SrTiO3PmEmbedded Imagemaoaoao
Neighborite subgroup
 Neighborite(Na,K)MgF3NaMgF3Pbnmaac+
 ParascandolaiteKMgF3KMgF3PmEmbedded Imagemaoaoao
Chlorocalcite subgroup
 ChlorocalciteKCaCl3KCaCl3Pbnmaac+
Double perovskites A2BB′ X6
Elpasolite subgroup
 ElpasoliteK2NaAlF6K2NaAlF6FmEmbedded Imagemaoaoao
 CryoliteNa2NaAlF6Na2NaAlF6P21/naac+
 SimmonsiteNa2LiAlF6Na2LiAlF6P21/naac+
Vapnikite subgroup
 VapnikiteCa2CaUO6Ca2CaUO6P21/naac+
 Latrappite (?)(Ca,Na)(Nb,Fe3+,Ti)O3Ca2NbFe3+O6P21/naac+
Double antiperovskites B2XX′A6
Sulphohalite subgroup
 SulphohaliteNa6FCl(SO4)2Na6FCl(SO4)2FmEmbedded Imagemaoaoao

* Octahedra in space groups Amm2 and P4mm are not tilted and the reduction in symmetry from PmEmbedded Imagem results from second order Jahn-Teller distortion.

Composition = compositional range of the mineral. Ideal = ideal composition of the end-member molecule. Sp.gp. = space group. Tilt = Glazer (1972) tilt scheme. REE = rare-earth element.