Citation: Sabalisck, N. P.; Guzm\'an-Afonso, C.; Gonz\'alez-Silgo, C.; Torres, M. E.; Pas\'an, J.; del-Castillo, J.; Ramos-Hern\'andez, D.; Hern\'andez-Su\'arez, A.; Mestres, L. (2017). Structures and thermal stability of the \a-LiNH4SO4 polytypes doped with Er3+ and Yb3+
. Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 73, pp. 122-.