Solid phase
Official name
Hydrogen sulfide phase III
Secondary names
H2S-III 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 III
Phase type
crystalline
Crystal system
orthorhombic
Crystal class
dipyramidal
Crystal class symbol
mmm (D2h)
Crystal spacegroup
Pbcm
Comments
Possibly tetragonal-pyramidal, 4 (C4), P4(2) - orientationally ordered
Molar mass
34.081 $g/mol$
State NTP
gas
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-solid phase II above 103.6 K
solid-solid from amorphous H2S (irreversible) above ~??K
solid-solid phase IV <153 K (above 3.1-3.7 GPa)
Refringence type
biaxial
Pure color
colorless
Diaphaneity
transparent
Luster
vitreous
Links