Materials with trigonal bipyramidal coordination and methods of making the same

US8282728B2 · kind B2 · utility

Assignee

• State of Oregon acting by and through the State Board of Higher Ed. on Behalf of Oregon State Univ. · US

Inventors

• Munirpallam A. Subramanian · Philomath, US
• Arthur W. Sleight · Kennett Square, US
• Andrew Smith · Terrace Park, US

Key dates

• Filing date: Jun 10, 2010
• Grant date: Oct 9, 2012
• Expiry date: Dec 24, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/768
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Embodiments of compositions comprising materials satisfying the general formula AM1−xM′xM″yO3+y are disclosed, along with methods of making the materials and compositions. In some embodiments, M and M′ are +3 cations, at least a portion of the M cations and the M′ 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 Å and edge c has a length of 10-13 Å. In other embodiments, edge a has a length of 5.5-7.0 Å. In particular embodiments, M′ is Mn, and Mn is bonded to oxygen with an apical Mn—O bond length of 1.80 Å to 1.95 Å. In some embodiments, the material is YIn1−xMnxO3, x is greater than 0.0 and less than 0.75, and the material exhibits a surprisingly intense blue color.