Ice V and XIII
- can be formed by slowly cooling liquid water at ~ 5 kbar from 20 °C to – 20 °C
- density: 1.23 g/cm3
- Ice V is a proton-disordered phase
- the analogous proton-ordered phase is Ice XIII
- all water molecules are hydrogen-bonded to four others, two as donor and two as acceptor, at distances of 2.76 to 2.87 Å
- the coordination tetrahedra are largely distorted with angles ranging from 84 to 128°.
- Ice V contains 4,- 5-, 6-, and 7-membered rings
- Space group: A2/a (No. 15)
- Crystal system: monoclinic
- Lattice parameters:
- a = 9.22(2) Å, b = 7.54(1) Å, c = 10.35(2) Å
- α = γ = 90°, β =109.2(2)°
- 28 molecules per unit cell
Here, you can download the CIF.
 B. Kamb, A. Prakash, C. Knobler, Structure of Ice V, Acta Cryst. 1967, 22, 706-715. DOI: 10.1107/S0365110X67001409
Atomistic structure figures were created with
K. Momma and F. Izumi, “VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data,” J. Appl. Crystallogr., 44, 1272-1276 (2011).