Oregon State University

Andrew E Smith

Arthur W Sleight

Munirpallam A Subramanian

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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Rice Lake, WI, United States of America

Andrew E Smith