Table 3.

Classification of A- and B-site vacant, and anion deficient perovskites.

CompositionIdealSp. gp.Tilt
A-site vacant skutterudites
Skutterudite subgroup
 Skutterudite(Co,Fe,Ni)As2–3CoAs3ImEmbedded Imagea+a+a+
 Kieftite(Co,Ni,Fe,Cu)(Sb,Cl)3CoSb3ImEmbedded Imagea+a+a+
 NickelskutteruditeNiAs2–3NiAs3ImEmbedded Imagea+a+a+
 Ferroskutterudite(Fe,Co)As3FeAs3ImEmbedded Imagea+a+a+
B-site vacant perovskites
Single perovskites
Oskarssonite subgroup
 OskarssoniteAl(F2.62(OH)0.49)AlF3REmbedded Imagecaac
Single antiperovskites
Cohenite subgroup
 CoheniteC(Fe,Ni,Co)3CFe3Pmaac+
Auricupride subgroup
 Auricupride(Au,Pd)Cu3AuCu3PmEmbedded Imagemaoaoao
 AtokiteSn(Pd,Pt)3SnPd3FmEmbedded Imagemaoaoao
 AwaruiteFe(Ni,Co)3FeNi3PmEmbedded Imagemaoaoao
 Chengdeite(Fe,Ni,Co,Cu)(Ir,Pt)FeIr3PmEmbedded Imagemaoaoao
 Isoferroplatinum(Fe,Cu,Ni)Pt3FePt3PmEmbedded Imagemaoaoao
 RustenburgiteSn(Pt,Pd)3SnPt3FmEmbedded Imagemaoaoao
 YixuniteInPt3InPt3PmEmbedded Imagemaoaoao
 Zvyagintsevite(Pb,Bi)(Pd,Pt)3PbPt3PmEmbedded Imagemaoaoao
Double Perovskite
 Diaboleite[Pb2Cu(OH)4Cl2][Pb2Cu(OH)4Cl2]P4mmaoaoao
Anion deficient perovskites
Brownmillerite subgroup
 BrownmilleriteCa2Fe3+AlO5Ca2Fe3+AlO5Ibm2-
 SrebrodolskiteCa2(Fe,Mg,Mn)2O5Ca2Embedded ImageO5Pcmn-
 Shulamitite(Ca,Sr,REE)(Ti,Zr,Nb)(Fe3+,Mn,Mg)(Al,Fe3+,Si)O8Ca3TiFe3+AlO8Pmma-
Hematophanite subgroup
 HematophanitePb4(Embedded Image,□)(Cl,OH)O8P4/mmm-

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