Crystal structure refinement, low- and high-temperature X-ray diffraction and Mössbauer spectroscopy study of the oxoborate ludwigite from the Iten'yurginskoe deposit

The crystal structure and thermal behavior of ludwigite (Mg,Fe²⁺,Mn)₂(Fe³⁺,Al,Mg)O₂(BO₃) from the Iten'yurginskoe deposit (Chukotka, Russia) are investigated for the first time in the range 80–1650 K. A comparison of the thermal behavior of Mg–Fe oxoborates of the ludwigite group, namely azoproite, vonsenite and ludwigite, is provided.