Lithium sulfate

Lithium sulfate
Lithium sulfate
Are common
Systematic ; name	Lithium sulfate
Traditional names	Lithium sulfate
Chem. formula	Li 2 SO 4
Physical properties
Molar mass	109.94 g / mol
Density	2.221 g / cm³
Thermal properties
T. melt.	859 ° C
Like heat resistant.	117.57 J / (mol · K)
Education enthalpy	-1436.0 kJ / mol
Specific heat of fusion	9.3 kJ / mol
Chemical properties
Water solubility	34.3 20 ; 29.2 100 g / 100 ml
Classification
Reg. CAS number	10377-48-7
Pubchem
Reg. EINECS number
SMILES
Inchi
RTECS
CHEBI
Chemspider

Lithium sulfate is a salt of an alkali metal of lithium and sulfuric acid . The chemical formula is Li ₂ SO ₄ . Forms crystalline hydrate Li ₂ SO ₄ • H ₂ O.

Getting

Lithium sulfate crystalline hydrate is prepared by reacting lithium hydroxide or lithium carbonate with sulfuric acid, followed by evaporation:

{\mathsf {2\ LiOH+H_{2}SO_{4}\ {\xrightarrow {\ }}\ Li_{2}SO_{4}+2\ H_{2}O}}

{\ displaystyle {\ mathsf {2 \ LiOH + H_ {2} SO_ {4} \ {\ xrightarrow {\}} \ Li_ {2} SO_ {4} +2 \ H_ {2} O}}}

{\mathsf {2\ LiOH+H_{2}SO_{4}\ {\xrightarrow {\ }}\ Li_{2}SO_{4}+2\ H_{2}O}}

Anhydrous salt is obtained by heating the monohydrate above 500 ° C.

Physical Properties

Anhydrous lithium sulfate forms three crystalline modifications:

α-form is a stable modification under normal conditions with a monoclinic lattice , space group P 2 ₁ / c, parameters a = 0.844 nm, b = 0.495 nm, c = 0.824 nm, β = 107.9 °, Z = 4.
β-form - hexagonal lattice
γ-form - at a temperature above 575 ° С forms a cubic lattice , space group I 4 3m, a = 0.707 nm, Z = 4.

Crystalline hydrate forms monoclinic syngony crystals, space group P 2 ₁ , parameters a = 0.814 nm, b = 0.483 nm, c = 0.543 nm, β = 107.58 °, Z = 4.

Chemical Properties

It interacts with sulfuric acid to form lithium hydrosulfate :

{\mathsf {Li_{2}SO_{4}+H_{2}SO_{4}\ {\xrightarrow {\ }}\ 2\ LiHSO_{4}}}

{\ displaystyle {\ mathsf {Li_ {2} SO_ {4} + H_ {2} SO_ {4} \ {\ xrightarrow {\}} \ 2 \ LiHSO_ {4}}}}

By interacting with barium compounds, it is convenient to obtain various lithium compounds:

{\mathsf {Li_{2}SO_{4}+Ba(OH)_{2}\ {\xrightarrow {\ }}\ 2\ LiOH+BaSO_{4}\downarrow }}

{\ displaystyle {\ mathsf {Li_ {2} SO_ {4} + Ba (OH) _ {2} \ {\ xrightarrow {\}} \ 2 \ LiOH + BaSO_ {4} \ downarrow}}}

{\mathsf {Li_{2}SO_{4}+Ba(N_{3})_{2}\ {\xrightarrow {\ }}\ 2\ LiN_{3}+BaSO_{4}\downarrow }}

{\ displaystyle {\ mathsf {Li_ {2} SO_ {4} + Ba (N_ {3}) _ {2} \ {\ xrightarrow {\}} \ 2 \ LiN_ {3} + BaSO_ {4} \ downarrow} }}

When heated with hydrogen , ammonia or carbon ( coke ) is reduced to lithium sulfide :

{\mathsf {Li_{2}SO_{4}+4\ C\ {\xrightarrow {800^{o}C}}\ Li_{2}S+4\ CO}}

{\ displaystyle {\ mathsf {Li_ {2} SO_ {4} +4 \ C \ {\ xrightarrow {800 ^ {o} C}} \ Li_ {2} S + 4 \ CO}}}

Application

Lithium sulfate is used for the manufacture of detector heads in ultrasonic inspection and as a component of phosphors . It is also used as a treatment for manic-depressive psychosis . This substance is a piezoelectric .

Physiological Action

Lithium sulfate has moderate toxicity. Like all lithium compounds, it affects the central nervous system .

Literature

Patnaik, P. Handbook of Inorganic Chemicals. - McGraw-Hill, 2003 .-- 1086 p. - ISBN 0-07-049439-8 .
Tom Jackson Lithium . - Marshall Cavendish, 2006 .-- P. 13 .-- 32 p. - ISBN 0761421998 .

Lithium sulfate


Are common
Systematic name	Lithium sulfate
Traditional names	Lithium sulfate
Chem. formula	Li ₂ SO ₄
Physical properties
Molar mass	109.94 g / mol
Density	2.221 g / cm³
Thermal properties
T. melt.	859 ° C
Like heat resistant.	117.57 J / (mol · K)
Education enthalpy	-1436.0 kJ / mol
Specific heat of fusion	9.3 kJ / mol
Chemical properties
Water solubility	34.3 ²⁰ ; 29.2 ¹⁰⁰ g / 100 ml
Classification
Reg. CAS number	10377-48-7
Pubchem
Reg. EINECS number
SMILES
Inchi
RTECS
CHEBI
Chemspider