Crystal data
C7H14O6	Dx = 1.521 Mg m−3
Mr = 194.19	Mo - Kα radiation
Orthorhombic, P212121	Cell parameters from 5715 reflections
a = 6.5756 (4) Å	θ = 3–27°
b = 11.0565 (7) Å	μ = 0.13 mm−1
c = 11.6622 (9) Å	T = 150 K
V = 847.88 (10) Å3	Plate, colourless
Z = 4	0.48 × 0.44 × 0.23 mm
Data collection
Nonius KappaCCD diffractometer	1151 independent reflections
ω scans	974 reflections with > 2.0σ(I)
Absorption correction: multi-scan (Otowinwski & Minor, 1997)	Rint = 0.035
Tmin = 0.926, Tmax = 0.972	θmax = 27.5°
5715 measured reflections
Refinement
Refinement on F2	1/[σ2(Fo2) + (0.0543P)2] where P = (Fo2 + 2Fc2)/3
R[F2 > 2σ(F2)] = 0.034	(Δ/σ)max < 0.001
wR(F2) = 0.085	Δρmax = 0.19 e Å−3
S = 1.05	Δρmin = −0.20 e Å−3
1151 reflections	Extinction correction: SHELXL97 (Sheldrick 1997)
140 parameters	Extinction coefficient: 0.036 (5)
H atoms treated by a mixture of independent and constrained refinement