Citation: Frank-Kamenetskaya, O. V.; Fundamenskii, V. S.; Tsytsenko, A. K.; Frank-Kamenetskii, V. A. (1994). Crystal structure of gagarinite from precision X-ray data: Structural changes in the NaCaTRF6-Na1.5TR1.5F6 series. Crystallography Reports, 39, pp. 923-928.