Provided is a copper chromium oxide spinel having a particle size used when made into a resin molded article and plating bonding properties, a resin composition of the same, a resin molded article, and a method for producing the copper chromium oxide spinel. Specifically, provided is a copper chromium oxide spinel containing molybdenum and having a D50 of 2.0 m or less.

In one aspect, the present invention provides a solid-state electrolyte material. The solid-state electrolyte material comprises a composition of Formula (XX), (XX-A), (XX-B), (XX-C), (I), (Ia), and/or (Ib), as described herein. Another aspect provides a method of making a green body. A further aspect provides a method of making a sintered solid-state electrolyte material.

In one aspect, the present invention provides a solid-state electrolyte material. The solid-state electrolyte material comprises a composition of Formula (XX), (XX-A), (XX-B), (XX-C), (I), (Ia), and/or (Ib), as described herein. Another aspect provides a method of making a green body. A further aspect provides a method of making a sintered solid-state electrolyte material.