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These are minerals that have more than one type of oxyanion THAT DO NOT SHOW SOLID SOLUTION WITH EACH

OTHER. Thus aluminosilicates, arsenato-silicates etc. are not listed here but may be found in the list of silicate minerals, e.g.,

amphiboles, micas etc. Be minerals are commonly mixed oxyanion structures (see list of Be-mineral papers) as Be is

dominantly [4]-coordinated but has a low Lewis acidity and hence generally bonds to other oxyanions of higher Lewis basicity, as occurs in Be phases of the milarite-group minerals.

Cooper, M.A., Hawthorne, F.C., García-Veigas, J., Alcobé, X., Helvacı, C. Grew, E.S., Ball, N.A. (2015) Fontarnauite, (Na,K)2(Sr,Ca)(SO4)[B5O8(OH)](H2O)2, a new sulfate-borate from DoÄŸanlar (Emet), Kütahya Province, Western Anatolia, Turkey. Canadian Mineralogist 53, 803-820.

Pautov, L.A., Agakhanov, A.A., Sokolova E., Hawthorne, F.C. and Karpenko, V.Yu. (2011) Byzantievite, Ba5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4),(SiO4)]4(BO3)9O21[(OH),F]43 (H2O)1.5, a new mineral. New Data on Minerals 46, 5-12 (in Russian).

Sokolova, E., Hawthorne, F.C., Pautov, L.A. and Agakhanov, A.A. (2010) Byzantievite, Ba5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4),(SiO4)]4(BO3)9O22[(OH),F]43(H2O)1.5; the crystal structure and crystal chemistry of the only known mineral with the oxyanions (BO3), (SiO4) and (PO4). Mineralogical Magazine 74, 285-308.

Cooper, M.A., Hawthorne, F.C. , Roberts, A.C., Grice, J.D., Stirling, J.A.R. and Moffatt, E.A. (1998) Georgeericksenite, Na6CaMg(IO3)6(CrO4)2(H2O)12, a new mineral from Oficina Chacabuco, Chile: Description and crystal structure. American Mineralogist 83, 390-399.

Cooper, M.A. and Hawthorne, F.C.  (1996) The crystal structure of rapidcreekite, Ca2(SO4)(CO3)(H2O)4, and its relation to the structure of gypsum. Canadian Mineralogist 34, 99-106.

Burns, P.C. and Hawthorne, F.C.  (1994) The crystal structure of humberstonite, a mixed sulfate-nitrate mineral. Canadian Mineralogist 32, 381-385.

Cooper, M. and Hawthorne, F.C.  (1994) The crystal structure of wherryite, Pb7Cu2(SO4)4(SiO4)2(OH)2, a mixed sulphate-silicate structure with [[6]M(TO4)2φ] chains. Canadian Mineralogist 32, 373-380.

Burns, P.C. and Hawthorne, F.C.  (1993) The crystal structure of dietzeite, Ca2(H2O)(IO3)2(CrO4), a heteropolyhedral framework mineral. Canadian Mineralogist 31, 313-319.

Groat, L.A. and Hawthorne, F.C.  (1986) The structure of ungemachite, K3Na8Fe3+(SO4)6(NO3)2.6H2O, a mixed sulphate‑nitrate mineral. American Mineralogist 71, 826‑829.

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