RbFe(HAsO4)2 and TlFe(HAsO4)2, two new hydrogenarsenates adopting two closely related structure types

Schwendtner, K.; Kolitsch, U.

doi:10.1107/S2056989018006473

Figure 4
The principal building units of (a) RbFe(HAsO₄)₂ and (b) TlFe(HAsO₄)₂ shown as displacement ellipsoids at the 70% probability level. Symmetry codes: RbFe(HAsO₄)₂: (i) x − y, −y, −z + $[{3\over 2}]$ ; (ii) −x, −x + y, −z + $[{3\over 2}]$ ; (iii) −x + y, −x, z; (iv) y, x, −z + $[{3\over 2}]$ ; (v) −y, x − y, z; (vi) −x + $[{2\over 3}]$ , −y − $[{2\over 3}]$ , −z + $[{4\over 3}]$ ; (vii) y + $[{2\over 3}]$ , −x + y+ $[{4\over 3}]$ , −z + $[{4\over 3}]$ ; (viii) x − y − $[{4\over 3}]$ , x − $[{2\over 3}]$ , −z + $[{4\over 3}]$ ; (ix) x − $[{1\over 3}]$ , x − y − $[{2\over 3}]$ , z − $[{1\over 6}]$ ; (x) −y − $[{1\over 3}]$ , −x + $[{1\over 3}]$ , z − $[{1\over 6}]$ ; (xi) −x + y + $[{2\over 3}]$ , y + $[{1\over 3}]$ , z − $[{1\over 6}]$ ; (xii) −x − $[{1\over 3}]$ , −y − $[{2\over 3}]$ , −z + $[{4\over 3}]$ ; (xiii) y + $[{2\over 3}]$ , −x + y + $[{1\over 3}]$ , −z + $[{4\over 3}]$ ; (xiv) x − y − $[{1\over 3}]$ , x + $[{1\over 3}]$ , −z + $[{4\over 3}]$ ; (xv) −y, x − y + 1, z; (xvi) x + 1, y + 1, z; (xvii) x, y + 1, z; (xviii) −x + y + 1, −x + 1, z; (xix) −x + $[{2\over 3}]$ , −y + $[{1\over 3}]$ , −z + $[{4\over 3}]$ ; (xx) x − 1, y, z; TlFe(HAsO₄)₂: −z; (ii) −x, −y + 2, −z; (iv) −x + 1, −y + 1, −z; (viii) −x, −y + 1, −z + 1; (ix) −x, −y + 1, −z.

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ISSN: 2056-9890

Volume 74| Part 6| June 2018| Pages 766-771

https://doi.org/10.1107/S2056989018006473

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