Solid phase
Official name
Hydrogen sulfide phase II
Secondary names
H2S-II ice
Type
Family
molecular solid
Class
hydrogen bonded molecular solid
Compound type
inorganic molecular solid
Chemical composition
Formula
$H_2S$
Chemical formula
H2S
Elemental formula
H2 S
Isotope mixture type
terrestrial abundance
2.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$H_2S$ Hydrogen sulfide molecule 1 1.0 1 pure main
Chemical bonds
  Bond Number
$-S \dots H-$ 2
$-S-H$ 2
Class
molecular solids with hydrogen bonded molecules (03)
Type
homomolecular H-bonded solids (03.01)
Phase name
Phase II
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
diploidal
Crystal class symbol
m-3 (Th)
Crystal spacegroup
Pa-3
Comments
orientationally disordered with anisotropic motions
Molar mass
34.081 $g/mol$
State NTP
gas
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-solid phase I above 126.2 K
solid-solid phase III below 103.6 K
solid-solid phase IV 153-300 K... (above 3-11 GPa)
Refringence type
isotropic
Pure color
colorless
Diaphaneity
transparent
Luster
vitreous
Links