Lithium molybdate
| Names | |
|---|---|
Other names
| |
| Identifiers | |
3D model (JSmol)
|
|
| ChemSpider | |
| ECHA InfoCard | 100.033.601 |
| EC Number |
|
PubChem CID
|
|
CompTox Dashboard (EPA)
|
|
| |
| |
| Properties | |
| 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) |
| very soluble | |
| Structure[1] | |
| Trigonal | |
| R3 (No. 146) | |
a = 1.432 nm, c = 0.956 nm
| |
Formula units (Z)
|
18 formula per cell |
| Tetrahedral | |
| Hazards | |
| GHS labelling:[2] | |
| Warning | |
| H315, H319, H335 | |
| 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) | |
| 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).
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
- ^ a b c 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.
- ^ "Lithium molybdate". pubchem.ncbi.nlm.nih.gov.
- ^ a b Perry, Dale L. (2016-04-19). Handbook of Inorganic Compounds. CRC Press. p. 240. ISBN 978-1-4398-1462-8.
- ^ a b 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.
- ^ a b 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.
- ^ a b 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.