Lithium molybdate

Lithium molybdate

Names
Other names Lithium molybdate(VI) Dilithium molybdate Dilithium dioxido(dioxo)molybdenum
Identifiers
CAS Number	13568-40-6  Y
3D model (JSmol)	Interactive image
ChemSpider	3346702  Y
ECHA InfoCard	100.033.601
EC Number	236-977-7
PubChem CID	6093689
CompTox Dashboard (EPA)	DTXSID80894904
InChI InChI=1S/2Li.Mo.4O/q2*+1;;;;2*-1 Y Key: NMHMDUCCVHOJQI-UHFFFAOYSA-N Y InChI=1/2Li.Mo.4O/q2*+1;;;;2*-1/r2Li.MoO4/c;;2-1(3,4)5/q2*+1;-2 Key: NMHMDUCCVHOJQI-FFXFYZCHAF
SMILES [Li+].[Li+].[O-][Mo]([O-])(=O)=O
Properties
Chemical formula	Li2MoO4
Molar mass	173.82 g/mol
Appearance	white odorless powder hygroscopic or transparent crystal
Density	3.07 g/cm3 (pure crystal), 2.66 g/cm3 (hydrated crystal)
Melting point	705 °C (1,301 °F; 978 K)
Solubility in water	very soluble
Structure [1]
Crystal structure	Trigonal
Space group	R3 (No. 146)
Lattice constant	a = 1.432 nm, c = 0.956 nm
Formula units (Z)	18 formula per cell
Coordination geometry	Tetrahedral
Hazards
GHS labelling: [2]
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
NFPA 704 (fire diamond)	3 0 1
Related compounds
Other cations	sodium molybdate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N  verify  (what is  YN ?) Infobox references

Lithium molybdate is an inorgnaic compound with the chemical formula Li₂MoO₄. It is a white solid forming trigonal crystals. ^[3]

Structure

At standard conditions it is isostructural to phenacite (Be₂SiO₄). ^{[1] [4]} Phrase transformations occur at elevated temperatures. ^[4]

Preparation

Lithium molybdate can be prepared by reacting lithium carbonate and molybdenum trioxide by a solid-state reaction route followed by recrystallization. ^[1]

Related compounds

A related lithium molybdenum oxide (Li₂MoO₂) with a hexagonal layered structure can be prepared by reacting Li₂MoO₄ with Mo metal at 900 °C. ^[5] It is isomorphous with α-NaFeO₂ (space group R3m, a = b = 2.8663 Å, c = 15.4743 Å, Z = 3). ^[5]

Uses

Lithium molybdate is used in petroleum cracking catalysts. ^[3] In the oxidative conversion of n-hexane, the addition of molybdenum species to a Li/MgO catalyst results in the formation of lithium molybdate mixed oxide phases. ^[6] This diminishes the formation of Li₂CO₃ in the catalyst, maintaining high surface area and stability. ^[6]

Lithium molybdate is used as corrosion inhibitor. ^[7]

Li₂MoO₄ crystals have been found applicable for cryogenic phonon-scintillation detectors, which are used to investigate some rare nuclear processes. ^[8]

The use of Li₂MoO₄ ceramics for antennas has been studied due to their low loss dielectric properties and the possibility to fabricate them by a room-temperature densification method instead of conventional sintering. ^[9] It has been used with hollow glass microspheres (HGMS) to make low permittivity composite for lenses in lens antennas. ^[10]

References

1. Barinova, Olga; Kirsanova, Svetlana; Sadovskiy, Andrey; Avetissov, Igor (2014-09-01). "Properties of Li2MoO4 single crystals grown by Czochralski technique". Journal of Crystal Growth. Proceedings of 17th International Conference on Crystal Growth and Epitaxy (ICCGE-17). 401: 853–856. doi:10.1016/j.jcrysgro.2013.10.051. ISSN   0022-0248.
2. "Lithium molybdate". pubchem.ncbi.nlm.nih.gov.
3. Perry, Dale L. (2016-04-19). Handbook of Inorganic Compounds. CRC Press. p. 240. ISBN   978-1-4398-1462-8.
4. Saraiva, G. D.; Paraguassu, W.; Freire, P. T. C.; Ramiro de Castro, A. J.; de Sousa, F. F.; Mendes Filho, J. (2017-07-05). "Temperature induced phase transformations on the Li2MoO4 system studied by Raman spectroscopy". Journal of Molecular Structure. 1139: 119–124. doi:10.1016/j.molstruc.2017.03.038. ISSN   0022-2860.
5. Aleandri, Lorraine E.; McCarley, Robert E. (2002-05-01). "Hexagonal lithium molybdate, LiMoO2: a close-packed layered structure with infinite molybdenum-molybdenum-bonded sheets". Inorganic Chemistry. 27 (6): 1041–1044. doi:10.1021/ic00279a021 . Retrieved 2026-01-25.
6. Boyadjian, Cassia; Lefferts, Leon (2020-03-23). "Promoting Li/MgO Catalyst with Molybdenum Oxide for Oxidative Conversion of n-Hexane". Catalysts. 10 (3): 354. doi: 10.3390/catal10030354 . ISSN   2073-4344.
7. Itoh, Masahiko; Midorikawa, Heihachiro; Izumiya, Masakiyo; Aizawa, Michihiko; Tanno, Kazuo (1990). "Corrosion Inhibition of Carbon Steel by Lithium Molybdate in Concentrated LiBr Solutions at Elevated Temperatures". Corrosion Engineering. 39 (6): 298–302. doi:10.3323/jcorr1974.39.6_298.
8. Barinova, O. P.; Danevich, F. A.; Degoda, V. Ya.; Kirsanova, S. V.; Kudovbenko, V. M.; Pirro, S.; Tretyak, V. I. (2010-01-21). "First test of Li₂MoO₄ crystal as a cryogenic scintillating bolometer". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 613 (1): 54–57. Bibcode:2010NIMPA.613...54B. doi:10.1016/j.nima.2009.11.059.
9. Kähäri, Hanna; Ramachandran, Prasadh; Juuti, Jari; Jantunen, Heli (2017). "Room-Temperature Densified Li2MoO4 Ceramic Patch Antenna and the Effect of Humidity". International Journal of Applied Ceramic Technology. 14: 50–55. doi:10.1111/ijac.12615. ISSN   1744-7402.
10. Kokkonen, Mikko; Nelo, Mikko; Chen, Jiangcheng; Myllymäki, Sami; Jantunen, Heli (2020). "Low Permittivity Environmentally Friendly Lenses for Ku Band". Progress in Electromagnetics Research Letters. 93: 1–7. doi: 10.2528/pierl20060108 . S2CID   221461236.