Table 2. Coordination numbers (CNs) of cations, average bond lengths and their variations (Å), and bond-valence sums (BVS, in valence units, v.u.) for the crystal structure of ilmajokite.

Bond valence units were calculated using parameters from Gagné & Hawthorne (2015 ▸).

Atom	CN	Bond lengths		BVS
		Average	Range (min–max)
Ba	10	2.899	2.818–2.968	1.91
K	6, 7	2.816	2.403–3.308	1.03–1.27
Na	3, 5, 6, 7, 8	2.555	1.999–3.022	0.42–1.10
Ce	9	2.543	2.481–2.626	3.00
Ti	6	1.955	1.853–2.105	3.99–4.17
Si	4	1.621	1.512–1.671	3.87–4.27