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lithium aluminate wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 history 2 fields of interest 3 formation toggle formation subsection 3 1 early methods 3 2 current methods 4 natural occurrence 5 references toggle the table of contents lithium aluminate 15 languages العربية تۆرکجه deutsch español فارسی français hrvatski 한국어 nederlands русский srpskohrvatski српскохрватски simple english српски srpski اردو 中文 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia lithium aluminate __ li __ al 3 __ o 2 names preferred iupac name lithium aluminate systematic iupac name lithium 1 aluminate other names lithium metaaluminate lithium aluminum oxide lithium aluminium double hydroxyde identifiers cas number 12003 67 7 y 3d model jsmol interactive image chemspider 109880 y echa infocard 100 031 291 ec number 234 434 9 mesh lithium aluminate pubchem cid 123268 comptox dashboard epa dtxsid40893150 inchi inchi 1s al li 2o q 1 1 y key yqnqtebhhusesq uhfffaoysa n y inchi 1 al li 2o q 1 1 ralo2 li c2 1 3 q 1 1 key yqnqtebhhusesq yiccbgqxae smiles li o al o properties chemical formula al li o 2 molar mass 65 92 g mol 1 appearance white crystalline powder density 2 615 g cm 3 solid melting point 1 625 1 c 2 957 f 1 898 k solubility in water insoluble thermochemistry std molar entropy s 298 53 35 j mol k 2 std enthalpy of formation δ f h 298 1188 670 kj mol 2 gibbs free energy δ f g 1126 276 kj mol 2 hazards safety data sheet sds external msds except where otherwise noted data are given for materials in their standard state at 25 c 77 f 100 kpa y verify what is y n infobox references chemical compound lithium aluminate lialo 2 also called lithium aluminium oxide is an inorganic chemical compound an aluminate of lithium in microelectronics lithium aluminate is considered as a lattice matching substrate for gallium nitride 3 4 in nuclear technology lithium aluminate is of interest as a solid tritium breeder material for preparing tritium fuel for nuclear fusion 5 lithium aluminate is a layered double hydroxide ldh with a crystal structure resembling that of hydrotalcite dubious discuss clarification needed lithium aluminate solubility at high ph 12 5 13 5 is much lower than that of aluminium oxides in the conditioning of low and intermediate level radioactive waste lilw lithium nitrate is sometimes used as additive to cement to minimise aluminium corrosion at high ph and subsequent hydrogen production 6 indeed upon addition of lithium nitrate to cement a passive layer of lih alo 2 2 5 h 2 o is formed onto the surface of metallic aluminium waste immobilised in mortar the lithium aluminate layer is insoluble in cement pore water and protects the underlying aluminium oxide covering the metallic aluminium from dissolution at high ph it is also a pore filler 7 this hinders the aluminium oxidation by the protons of water and reduces the hydrogen evolution rate by a factor of 10 8 lithium aluminate also finds its use as an inert electrolyte support material in molten carbonate fuel cells where the electrolyte may be a mixture of lithium carbonate potassium carbonate and sodium carbonate 9 history edit in 1906 weyberg described his newly synthesized compound lithium hydrogen aluminate this was the first known synthesis of this unique compound he asserted that this new compound had the corresponding chemical formula 10 lihal 2 o 4 5 h 2 o in 1915 allen and rogers asserted that an insoluble aluminate of lithium is formed when aluminum is dissolved in a solution of lithium hydroxide this air dried substance had an atomic ratio of 2li 5al and the chemical formula 11 lih alo 2 2 5 h 2 o in 1929 prociv recreated allen and rogers experiment and through a series of conductometric measurements on the saturated solution of the substance concluded that lithium and aluminum were present in the ratio of 0 8li 2al which he says is an atomic ratio of approximately 1li 2al according to him lithium aluminate may also be precipitated by the addition of a solution of lithium hydroxide to a solution of aluminum salt or by adding a solution of lithium salt to a solution of an alkali aluminate thus there was disagreement between allen rogers and prociv as to the composition of lithium aluminate this may have been attributed to variations between their precipitation conditions 11 in 1932 dobbins and sanders described the formation of lithium aluminate by the addition of dilute ammonia to a solution containing lithium and aluminum salt in the presence of phenolphthalein as an indicator in their preparation of acid lithium aluminate they dissolved strips of amalgamated aluminum in normal and tenth normal solutions of lithium hydroxide the lithium aluminate was precipitated by the addition of a solution of lithium hydroxide to a solution of aluminum salts or by adding a solution of lithium salt to a solution of alkaline aluminate in all cases the composition of the compound of lithium aluminate was expressed by the formula 12 li 2 o 2 al 2 o 2 they claimed that the formed compound contained lithium and aluminum in the atomic ratio of 2li 5al their chemical formula was simplified into the modern formulation for lithium aluminate lialo 2 fields of interest edit the fundamental compound of lithium aluminate has found attention in two different fields nuclear physics and solid state chemistry at least five different phases of lithium aluminate have been found 13 the lithium aluminate crystal structure may be found in either α β or γ phases 14 nuclear physicists are interested in the γ lialo 2 modification of lithium aluminate because of its good performance under high neutron and electron radiation this modification also exhibits the essential chemical thermo physical and mechanical stability at high temperature along with the required irradiation behavior this phase appears to be a promising lithium ceramic suitable as an in site tritium breeding material in future fusion reactors 13 solid state chemists investigating preparational routes to lithium aluminate discovered its interesting acid base chemistry the α lialo 2 modification but neither β lialo 2 or γ lialo 2 reacts with molten benzoic acid leading to nearly total li proton exchange thus forming lihal 2 o 4 there is a lot of interest in the chemical reactivity among the three modifications of lialo 2 the reasons for the α lialo 2 modification being highly reactive and the β lialo 2 or γ lialo 2 modifications being totally unreactive is currently a mystery 13 formation edit early methods edit lithium aluminate powder preparation was based on the solid state reactions between al 2 o 3 and lithium containing compounds like li 2 co 3 lioh li 2 o liac and reactions occurred at temperatures between 400deg c to 1000 deg c due to the evaporation of lithium at high temperatures and contamination from grinding operations pure lithium aluminate with controlled particle size has been difficult to synthesize 15 current methods edit synthesis of lithium aluminate has been essentially performed by several methods in the solid state by wet chemical sol gel with the use of templates various precursors and combustion processes the main product in a solid state reaction is the α lialo 2 phase in a wet chemical reaction the main product is a solid solution of α lialo 2 and γ lialo 2 phases 14 the α lialo 2 modification low temperature phase with a hexagonal structure undergoes transformation to the γ modification high temperature phase with a tetragonal structure at about 900 c the metastable β modification with a monoclinic structure is assumed to transform to the γ modification at about 900 c 15 natural occurrence edit the compound is unknown in the natural environment however a related compound lial 5 o 8 is known as the very recently discovered as of 2020 and very rare mineral chukochenite 16 17 references edit lithium aluminate american elements retrieved 26 july 2023 1 2 3 r robie b hemingway and j fisher thermodynamic properties of minerals and related substances at 298 15k and 1bar pressure and at higher temperatures us geol surv vol 1452 1978 mancuso gordon aug 2008 surface phase transformation in lithium aluminate bs byu via citeseerx lithium aluminate substrate for low cost nonpolar gallium nitride technical report aixtron se lithium aluminate material development pacific northwest national lab retrieved 26 july 2023 matsuo toshiaki takashi nishi masami matsuda tatsuo izumida 1995 lino 3 addition to prevent hydrogen gas generation from cement solidified aluminum wastes journal of nuclear science and technology 32 9 912 920 doi 10 1080 18811248 1995 9731793 issn 0022 3131 fujita m tanaka h muramatsu h asoh h ono s 2013 10 15 corrosion resistance improvement technology of anodic oxide films on aluminum alloy that uses a lithium hydroxide solution warrendale pa sae international retrieved 2014 11 08 matsuo toshiaki masami matsuda michihiko hironaga yoshihiko horikawa 1996 11 01 effect of lino 3 on corrosion prevention of aluminum wastes after their land disposal journal of nuclear science and technology 33 11 852 862 doi 10 1080 18811248 1996 9732020 issn 0022 3131 molten carbonate fuel cell electrolyte archived 2007 09 29 at the wayback machine united states patent 4079171 weyberg chemisches zentralblatt 1906 645 print 1 2 the formation and composition of lithium aluminate harold a horan and john b damiano journal of the american chemical society 1935 57 12 2434 2436 determination of aluminum formation lithium aluminate j t dobbins and j p sanders journal of the american chemical society 1932 54 1 178 180 1 2 3 reactivity and acidity of li in lithium aluminum oxide lialo2 phases richard dronskowski inorganic chemistry 1993 32 1 1 9 1 2 synthesis of lithium aluminate by thermal decomposition of a lithium dawsonite type precursor j jimenez becerril i garcia sosa journal of ceramic processing research vol 12 no 1 pp 52 56 2011 1 2 chatterjee naskar novel technique for the synthesis of lithium aluminate lialo2 powders from water based sols journal of materials science letters vol 22 issue 24 pp 1747 1749 chukochenite list of minerals 21 march 2011 v t e lithium compounds list compounds with noble gases lihe hlihe hypothetical lifheo hypothetical lihe 2 hypothetical heo lif 2 hypothetical la 2 3 x li 3x tio 3 he hypothetical compounds with halogens flibe flinak liat hypothetical libr libro libro 2 libro 3 libro 4 licl liclo liclo 2 liclo 3 liclo 4 lif li 2 f lifo lii liio liio 2 liio 3 liio 4 oxides and hydroxides lio lio 2 lio 3 li 2 o li 2 o 2 lioh compounds with chalcogens licf 3 so 3 lihso 3 lihso 4 li 2 po li 2 s li 2 se li 2 seo 3 li 2 seo 4 li 2 te lite 3 li 2 teo 3 li 2 teo 4 compounds with pnictogens li 1 x al x ge 2 x po 4 3 lial 1 x ti 2 x po 4 3 li 3 sb lias liasf 6 li 3 aso 4 lifepo 4 lige 2 po 4 3 lih 2 aso 4 li 2 haso 4 li 2 hpo 3 li 2 hpo 4 li 3 po 3 li 3 po 4 lih 2 po 3 lih 2 po 4 lin 3 li 3 n linh 2 li 2 nh lino 2 lino 3 li 2 n 2 o 2 li 2 napo 3 linano 2 li 3 p lipf 6 li 3 po 4 li sbf 6 liti 2 po 4 3 lizr 2 po 4 3 compounds with group 14 elements li 2 c 2 li 2 co 3 li 2 gef 6 li 2 geo 3 lihco 3 li 3 h co 3 2 lisi li 2 sif 6 li 2 sio 3 li 2 si 2 o 5 li 4 sio 4 li 2 snf 6 compounds with group 13 elements cslib 6 o 10 lialcl 4 lialf 4 li 3 alf 6 lialh 4 lialo 2 lib c 2 o 4 2 lib c 6 f 5 4 libf 4 libh 4 libo 2 lib 3 o 5 li 2 b 4 o 7 libsi 2 ligah 4 compounds with transition metals li aucl 4 licoo 2 li 2 cro 4 li 2 cr 2 o 7 li 2 iro 3 li 7 la 3 zr 2 o 12 limn 2 o 4 li 2 moo 4 li 0 9 mo 6 o 17 linbo 3 li 2 nbo 3 li 2 pto 3 li 2 ruo 3 litao 3 li 2 tif 6 li 2 tio 3 li 4 ti 5 o 12 livo 3 li 3 v 2 po 4 3 liwf 6 li 2 wo 4 li 2 zrf 6 li 2 zro 3 organic soaps hemolithin extraterrestrial protein organolithium reagents gilman reagent ch 3 cooli c 4 h 6 lino 4 lic 2 f 6 no 4 s 2 lin sime 3 2 li 3 c 6 h 5 o 7 c 5 h 5 li lin c 3 h 7 2 c 6 h 5 2 pli c 18 h 35 lio 3 c 6 h 13 li c 4 h 9 li ch 3 chlich 2 ch 3 ch 3 3 cli c 12 h 28 bli ch 3 li li c 10 h 8 c 5 h 11 li c 5 h 3 lin 2 o 4 c 6 h 5 li lic 2 ch 3 c 7 h 5 lio 3 lio 2 c ch 2 16 ch 3 c 4 h 5 lio 4 liet 3 bh lioc ch 3 3 c 9 h 18 lin lic 2 h 3 lic 11 h 23 coo ch 3 ch oh cooli lic 2 h 2 clo 2 lic 2 h 3 io 2 li ch 3 2 n licho 2 lich 3 o lic 2 h 5 o li 2 c 2 o 4 other compounds li 2 li x be y hypothetical licn li 2 cn 2 licno lih lina liscn liyf 4 neodymium doped minerals amblygonite berezanskite brannockite cryolithionite darapiosite darrellhenryite elbaite fluorine elbaite fluor liddicoatite emeleusite eucryptite faizievite hectorite hsianghualite jadarite kunzite lavinskyite lepidolite lithiophilite lithiophosphate manandonite manganoneptunite nambulite neptunite olympite petalite pezzottaite rossmanite saliotite sogdianite spodumene sugilite tiptopite tourmaline triphylite zabuyelite zektzerite zinnwaldite other li related aluminium lithium alloys heteroatom promoted lateral lithiation lb buffer lithium atom lithium medication lithium cocrystal lini x co y al z o 2 lini x mn y co z o 2 lithium soap lithium triangle lucifer yellow magnesium lithium alloys nasicon environmentally friendly red light flare retrieved from https en wikipedia org w index php title lithium_aluminate oldid 1351388878 categories aluminates lithium compounds hidden categories articles without ebi source articles without kegg source articles without unii source echa infocard id from wikidata articles containing unverified chemical infoboxes articles with short description short description matches wikidata all accuracy disputes articles with disputed statements from november 2014 wikipedia articles needing clarification from january 2023 webarchive template wayback links this page was last edited on 27 april 2026 at 17 02 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents lithium aluminate 15 languages add topic