Table 2. Experimental details.

Crystal data
Chemical formula	Na2SO3(H2O)7
M r	252.15
Crystal system, space group	Monoclinic, C1121/a
Temperature (K)	100
a, b, c (Å)	14.6563 (8), 19.7180 (9), 7.2197 (5)
γ (°)	94.0997 (17)
V (Å3)	2081.1 (2)
Z	8
Radiation type	Mo Kα
μ (mm−1)	0.42
Crystal size (mm)	0.15 × 0.13 × 0.12
Data collection
Diffractometer	Bruker APEXII CCD
Absorption correction	Multi-scan (SADABS; Krause et al., 2015 ▸)
T min, T max	0.675, 0.747
No. of measured, independent and observed [I > 2σ(I)] reflections	16909, 4845, 4222
R int	0.021
(sin θ/λ)max (Å−1)	0.827
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S	0.023, 0.063, 1.06
No. of reflections	4845
No. of parameters	174
H-atom treatment	All H-atom parameters refined
Δρmax, Δρmin (e Å−3)	0.89, −0.33

Com­puter programs: APEX2 (Bruker, 2014 ▸), SAINT (Bruker, 2014 ▸), SHELXT (Sheldrick, 2015a ▸), SHELXL2018 (Sheldrick, 2015b ▸), ATOMS (Dowty, 2006 ▸), Mercury (Macrae et al., 2020 ▸) and publCIF (Westrip, 2010 ▸).