Constituent
Name
H2O crystalline - phase Ih and/or Ic
Official name
Water ice Ih
Family
molecular solid
Class
hydrogen bonded molecular solid
Compound type
inorganic molecular solid
Comments
Subsequent to the process of deposition, the crystalline ice film was cooled to the desired irradiation temperature (20-120 K). It is important to note that, in this context, "crystalline water ice" is referring to the metastable cubic Ic and/or the hexagonal Ih crystalline forms of water ice. The precise crystalline nature of thin films remains uncertain due to the presence of stacking disorders during the film’s growth process.
Constituent abundance in material
Relevance
main - major
Arrangement
single phase
Mass fraction
1.0
Mole fraction
1.0 $\pm$ 0.0001
Abundance comments
potentially some remaining CO2, O2 and N2 in very low, but unestimated, abundances
Chemical composition
Formula
$H_2O$
Chemical formula
H2O
Elemental formula
H2 O
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$H_2O$ Water molecule 1 1.0 1.0 pure main
Chemical functions
  Function Number Relevance
$R-OH$ 2 main
Chemical bonds
  Bond Number Relevance
$-O \dots H-$ 4
$-O-H$ 2 main
Oxides
Formula $H_{2}O$
Mass fraction (%) 1.0
Class
molecular solids with hydrogen bonded molecules (03)
Type
homomolecular H-bonded solids (03.01)
Group
H2O polymorphs (03.01.01)
Code
03.01.01.01
Phase name
H2O Ih
Phase type
crystalline
Crystal system
hexagonal
Crystal class
dihexagonal-dipyramidal
Crystal class symbol
6/mmm (D6h)
Crystal spacegroup
P6(3)/mmc
Texture
polycrystalline
Molar mass
18.0153 $g/mol$
Density
0.917 (273 K) - 0.928 (90 K) $g/cm^3$
Refringence type
uniaxial
Refringence sign
unknown
Birefringence
0.01
Refraction index $n_{\alpha}$
1.31
Refraction index $n_{\beta}$
1.33
Color
light blue (when thick)
Diaphaneity
transparent
Luster
vitreous