Constituent
Name
H2S phase II
Official name
Hydrogen sulfide phase II
Family
molecular solid
Class
hydrogen bonded molecular solid
Compound type
inorganic molecular solid
Constituent abundance in material
Relevance
main - major
Arrangement
single phase
Mass fraction
1.0
Mole fraction
1.0 $\pm$ 0.0001
Chemical composition
Formula
$H_2S$
Chemical formula
H2S
Elemental formula
(H)1.984-1.998 (S)0.992-0.999
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$H_2S$ Hydrogen sulfide molecule 0.992 - 0.999 0.9955 $\pm$ 0.003500000000000003 1 pure main
$OCS$ Carbonyl sulfide molecule 0.001 - 0.008 0.0045000000000000005 $\pm$ 0.0035 1 mixed impurity
Composition comments
possible impurities in the 99.7% H2S gas bottle: OCS, CS2, CH4, CO2, N2 - OCS seen in spectra at 2045cm-1 - to be quantified, possibly much more abundant!
Chemical bonds
  Bond Number Relevance
$-S \dots H-$ 2
$-S-H$ 2 main
$=C=O$ 1 impurity
$=C=S$ 1 impurity
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
Texture
polycrystalline
Molar mass
34.081 $g/mol$
Refringence type
isotropic
Diaphaneity
transparent
Luster
vitreous