Mixed phases with a rutile or polyrutile structure

Claim 1

SOLID SOLUTIONS CONSISTING OF RUTILE LATTICE FORMING COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF TIO2, SNO2, B-MNO2, PBO2, VO2, GEO2, TEO2, CRO2, RUO2, OSO2, IRO2, MGF2, ZNF2, MNF2, FEF2, COF2, NIF2, PDF2, LISB3O2 MGSB2O6, ZNSB2O6, FESB2O6, COSB2, NISB2O6, CUSB2O6, ALSBO4O6, GABSO4, VSBO4, CRSBO4, FESBO4, RHSBO4, MGTA2O6, NITA2O6, COTA2O6, FETA2O6, CRTAO4, FETAO4, RHATO4, CRNBO4, CRNBO6, FENBO4, RHNBO4 AND RHVO4, AND ADDITIONAL COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF 2-VALENT METAL FLUORIDES, 1-, 2- AND 3-VALENT METAL OXIDES AND FLUORIDES, 5- AND 6-VALENT METAL OXIDES, MIXTURES THEREOF AND MIXTURES OF 2-VALENT METAL FLUORIDES, 1-, 2- AND 3-VALENT METAL OXIDES AND FLUORIDES AND 5- AND 6-VALENT METAL OXIDES WITH 4-VALENT METAL OXIDES, THE CATIONS OF SAID ADDITIONAL COMPOUNDS POSSESS RADII BETWEEN 0.46 A. AND 0.91 A., AND SAID ADDITIONAL COMPOUNDS BEING PRESENT IN SUCH PROPORTIONS, RELATIVELY TO ONE ANOTHER, THAT THE RATIO OF THE SUM OF THEIR CATIONS TO THE SUM OF THEIR ANIONS IS 1:2 ($2%) WHILE PRESERVING STATISTICAL ELECTRONEUTRALITY IN THE LATTICE.