The experimental X-ray data, d _exp, are from Baneyeva Popova (1969 ▶). The d-spacings calculated from Baneyeva and Popova’s structure and the structure derived in this work are given in the columns d _cBan and d _c1, respectively. The space group is (No. 164) and the atom positions (x/a, y/b, z/c) in the asymmetric unit of both structures are Zn1: 0, 0, 0 and O1: . The position of the H1 atom is . The value of z _O1 which is calculated using equation (8) is given in the table (it is different for the two structures). V _cell and V _oct are the volumes of the unit cell and the ZnO octahedron, respectively.

No.	hkl	d exp ()	d cBan ()	d c1 ()
1	001	4.69	4.71	4.69
2	010	2.73	2.77	2.75
3	011	2.35	2.39	2.37
4	002	2.31	2.36	2.35
5	012	1.77	1.79	1.79
6	110	1.59	1.60	1.59
7	111	1.50	1.51	1.51
8	020	1.38	1.38	1.38
9	021	1.32	1.33	1.32
10	022	1.19	1.19	1.19
11	014	1.07	1.08	1.08
12	023	1.03	1.04	1.03
13	121	1.01	1.02	1.02