Table 3. Topological types of Si tetrahedra in the crystal structure of ilmajokite.

General type	Specific type	Si Sites
Q 2	Q 2 Si + Ti	3, 21
	Q 2 2Si	17†, 37†, 38†, 39†, 40†, 41†
	Q 2 2Ti	36
Q 3	Q 3 2Si + Ti	2, 8, 9, 14, 19, 29, 33, 35
	Q 3 3Si	5, 13, 24, 25
	Q 3 2Ti + Si	20, 31
Q 4	Q 4 2Ti + 2Si	1, 4, 6, 12, 15, 16, 18, 22, 23, 26, 27, 28, 32, 34
	Q 4 4Ti	7
	Q 4 3Si + Ti	11, 30
Q 5	Q 5 3Si + 2Ti	10

^†Partially occupied sites.