Constituent H2S phase III | SSHADE

Processing math: 100%

Constituent

Name: H2S phase III
Official name: Hydrogen sulfide phase III

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 functions and bonds

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 III
Phase type: crystalline

Crystallography

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

Physical properties

Molar mass: 34.081 $g/mol$

Optical properties

Refringence type: biaxial
Diaphaneity: transparent
Luster: vitreous