kostbartlite

Kostbartlite is a synthetic inorganic crystalline material described in early research as a potential candidate for photonic and energy-related applications. It is characterized as a potassium-containing oxide with a framework-like structure that can be doped to tune optical and electrical properties. The material has drawn interest for its reported combination of a wide band gap, relatively high refractive index, and possible ionic conductivity under certain conditions.

Origin and name: The term kostbartlite is proposed to derive from the German word kostbar, meaning precious, together with the mineral- and -lite naming convention often used for crystalline facets. The name reflects its proposed role as a durable functional crystal rather than a natural mineral.

Synthesis and structure: Kostbartlite is typically produced through high-temperature solid-state synthesis in controlled atmospheres or via hydrothermal growth methods. Reported crystal structures include tetragonal and monoclinic polymorphs, with lattice parameters that can accommodate various dopant ions to modify properties.

Properties: Reported properties vary with composition and synthesis, but common themes include a high melting point, moderate hardness, and a refractive index in the upper range for oxide crystals. When doped with transition metals or rare-earth ions, kostbartlite may exhibit enhanced non-linear optical responses and visible to near-infrared emission. Some formulations are studied for potential ionic conductivity at elevated temperatures.

Applications and status: Proposed uses encompass optical waveguides, frequency conversion devices, and solid-state battery electrodes. As of current literature, kostbartlite remains in early-stage investigation with limited independent replication and no established commercial production.

See also: nonlinear optical materials, oxide-based photonic materials, solid-state electrolytes.