Ammonium tetrathiomolybdate | SSHADE

Loading [MathJax]/jax/element/mml/optable/CombDiactForSymbols.js

Solid phase

Official name: Ammonium tetrathiomolybdate

Name and identifiers

Secondary names: Ammonium thiomolybdate; Tiomolibdate diammonium; diazanium;bis(sulfanylidene)molybdenum;sulfanide; H10MoN2S4
CAS number: 15060-55-6

Family: ionic solid
Class: alkali salt
Compound type: molybdate

Chemical composition

Formula: $(NH_4^+)_2 \cdot (MoS_4)^{2-}$
Chemical formula: (NH4)2.MoS4
Elemental formula: (N+)2 H8 Mo S2 (S-)2
Isotope mixture type: terrestrial abundance

6.0

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$NH_4^+$	Ammonium ion	molecule	2	0.6666666666666666	1	molecular ion	main
	$MoS_4^{2-}$	Tetrathiomolybdate	molecule	1	0.3333333333333333	1	molecular ion	main

Chemical functions and bonds

Chemical functions

	Function	Number
	$H_4 >\mid N^+$	1
	$(MoS_4)^{2-}$	1

Chemical bonds

	Bond	Number
	$>\mid N^{+} \cdot S^{-}-$	2
	$\geq N^+-H$	4
	$\geqq Mo=S$	2
	$\gg Mo-S^{-}$	2
	$\dddot - \dddot - \dddot - Mo \dddot - S^{-1/2}$	4

Class: alkali salts (06)
Type: simple alkali salts (06.01)

Crystallography

Phase type: crystalline
Crystal system: orthorhombic
Crystal class: dipyramidal
Crystal class symbol: mmm (D2h)
Crystal spacegroup: Pnma

Physical properties

Molar mass: 260.28 $g/mol$

Thermodynamical properties

State NTP

solid

Phase transitions

Phase transition type	Other phases	Temperature - Pressure
solid-liquid decomposition		> ~155°C (> ~428 K)

Optical properties

Refringence type: biaxial
Pure color: red
Color: red

Links and Publications

Links