Abstract GaMn 3 B 6 O 13 (OH), monoclinic, P 2 1 / c (no. 14), a = 4.498(1) Å, b = 6.851(1) Å, c = 13.285(1) Å, β = 90.963(1)°, V = 409.30(2) Å 3 , Z = 2, R gt ( F ) = 0.0197, wR ref ( F 2 ) = 0.0485, T = 299(2) K.
Pasqualini et al. (Fri,) studied this question.