Structures and thermal stability of the α-LiNH4SO4 polytypes doped with Er3+ and Yb3+

Sabalisck, N.P.; Guzmán-Afonso, C.; González-Silgo, C.; Torres, M.E.; Pasán, J.; del-Castillo, J.; Ramos-Hernández, D.; Hernández-Suárez, A.; Mestres, L.

doi:10.1107/S2052520616019028

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 6
View of the structures of (a) the $[\alpha _{{2}}]$ -polytype and (b) the ferroelectric β-phase, showing different typologies. Chains of SO₄ and LiO₄ tetrahedra connected in different ways to form each structural type: α and β. Note that there is an axis with the same length or multiples thereof in both structures.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 73| Part 1| February 2017| Pages 122-133

https://doi.org/10.1107/S2052520616019028

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