<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The title compound is synthesized by sintering of Li<sub>2</sub>CO<sub>3</sub>, La<sub>2</sub>O<sub>3</sub>, ZrO<sub>2</sub>, and Fe<sub>2</sub>O<sub>3</sub> in air (Pt crucible, 1100 °C, 17 h).</p> </abstract>