Constituent
- Name
- H2S phase III
- Official name
- Hydrogen sulfide phase III
- Family
- molecular solid
- Class
- hydrogen bonded molecular solid
- Compound type
- inorganic molecular solid
- Relevance
- main - major
- Arrangement
- single phase
- Mass fraction
- 1.0
- Mole fraction
- 1.0 $\pm$ 0.0001
- Formula
- $H_2S$
- Chemical formula
- H2S
- Elemental formula
- (H)1.984-1.998 (S)0.992-0.999
- Isotope mixture type
- terrestrial abundance
- 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!
- 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
- Texture
- polycrystalline
- Molar mass
- 34.081 $g/mol$
- Refringence type
- biaxial
- Diaphaneity
- transparent
- Luster
- vitreous