Table 1. Crystal data and structure refinement for ilmajokite.

Crystal data
Chemical formula	Ba0.45H44.25Ce1.04K0.55Na5.62O76.74Si18.76Ti6
M r	2445.37
Crystal system, space group	Monoclinic, C2/c
Temperature (K)	296
a, b, c (Å)	35.908 (5), 27.784 (3), 33.126 (4)
β (°)	96.494 (3)
V (Å3)	32836 (7)
Z	16
Radiation type	Mo Kα
μ (mm−1)	1.79
Crystal size (mm)	0.15 × 0.08 × 0.04
Data collection
Diffractometer	Bruker Kappa APEX DUO
Absorption correction	Multi-scan
No. of measured, independent, observed [I > 2σ(I)] reflections	108441, 21527, 14797
R int	0.130
θmax (°)	22.7
(sin θ/λ)max (Å−1)	0.543
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S	0.081, 0.264, 0.97
No. of parameters	1847
No. of restraints	18
H-atom treatment	H-atom parameters not defined
	w = 1/[σ2(F o 2) + (0.1738P)2 + 608.3564P] where P = (F o 2 + 2F c 2)/3
Δρmax, Δρmin (e Å−3)	1.89, −2.80