K <sub>6</sub> Mo <sub>8</sub> PO <sub>29</sub> OH·H <sub>2</sub> O and K <sub>6</sub> Mo <sub>5</sub> P <sub>2</sub> O <sub>23</sub> ·7H <sub>2</sub> O: strongly distorted [MoO <sub>6</sub> ] octahedral groups effectively enhance birefringence
Two molybdate phosphates were synthesized based on the design of K 3 PO 4 introducing a strongly distorted [MoO 6 ] group to effectively enhance birefringence from 0.006 to 0.07...