Abstract The two compounds Fe 2 B 3 O 7 ( a = 663.61(4), c 438.39(3) pm, space group: P 4 ‾ $\overline{4}$ 1 m ) and Mn 4 (B 6 13 (OH)) 445.14(1), b 683.56(2), 1330.34(3) β 90.42(1)°, / were synthesized under high-pressure/high-tempera...

Abstract The structure family of the rare‐earth calcium oxoborates O[BO 3 ] (RCOB) has been investigated mainly with regard to their optical characteristics. Due monoclinic‐domatic they exhibit pyro‐ and piezoelectric properties, which is not dependent on numerous possible substitutions cation site R . cations are known show partial disorder earth alkaline positions X Z To study whether a stabi...