Oregon State University

Munirpallam A Subramanian

Arthur W Sleight

Jun Li

Andrew E Smith

Novel colored compounds with a hibonite structure and a method for making the same are disclosed. The compounds may have a formula AAlMMOwhere A is typically an alkali metal, an alkaline earth metal, a rare earth metal, Pb, Bi or any combination thereof, and Mis Ni, Fe, Cu, Cr, V, Mn, or Co or any combination thereof, and Mis Ti, Sn, Ge, Si, Zr, Hf, Ga, In, Zn, Mg, Nb, Ta, Sb, Mo, W or Te or any combination thereof. Compounds with varying colors, such as blue, can be made by varying A, Mand Mand their relative amounts. Compositions comprising the compounds and methods for making and using the same are also disclosed.

Compounds comprising a hibonite structure and a method for their use

Embodiments of compositions comprising materials satisfying the general formula AMM'M&#x2033;Oare disclosed, along with methods of making the materials and compositions. In some embodiments, M and M&#x2032; are +3 cations, at least a portion of the M cations and the M&#x2032; cations are bound to oxygen in trigonal bipyramidal coordination, and the material is chromophoric. In some embodiments, the material forms a crystal structure having a hexagonal unit cell wherein edge a has a length of 3.50-3.70 &#x212b; and edge c has a length of 10-13 &#x212b;. In other embodiments, edge a has a length of 5.5-7.0 &#x212b;. In particular embodiments, M&#x2032; is Mn, and Mn is bonded to oxygen with an apical Mn&#x2014;O bond length of 1.80 &#x212b; to 1.95 &#x212b;. In some embodiments, the material is YInMnO, x is greater than 0.0 and less than 0.75, and the material exhibits a surprisingly intense blue color.

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Philomath, OR, United States of America

Munirpallam A Subramanian