Lithium arsenide
{{Chembox
| ImageFile =
| ImageSize =
| ImageAlt =
| PIN =
| OtherNames = Litium monoarsenide
|Section1={{Chembox Identifiers
| index_label = Li3As
| index1_label = LiAs
| index2_label = Li3As7
| CASNo = 12044-22-3
| CASNo_Ref = {{cascite|correct|CAS}}
| ChemSpiderID = 74786
| ChemSpiderID1 = 9151176
| DTXSID = DTXSID5065221
| UNII_Ref = {{fdacite|changed|FDA}}
| UNII =
| EINECS = 234-950-4
| PubChem = 82878
| PubChem1 = 10975975
| QID1 = Q17361158
| StdInChI=1S/As.3Li
| StdInChIKey = NVMVLBOIYVUMOZ-UHFFFAOYSA-N
| SMILES = [Li][As]([Li])[Li]
| SMILES1 = [Li][As]
| InChI1=1S/As.Li
| InChIKey1 = FKQOMXQAEKRXDM-UHFFFAOYSA-N
| SMILES2 = [Li+].[Li+].[Li+].[As]12[As-][As]3[As-][As]1[As]2[As-]3
| InChI2=1S/As7.3Li/c1-4-2-6-5(1)7(6)3-4;;;/q-3;3*+1
| InChIKey2=NEEYWAPSSYXKNR-UHFFFAOYSA-N
}}
|Section2={{Chembox Properties
| Li=3|As=1
| MolarMass =
| Appearance = red-brown
| Density = 3.71 g/cm3
| MeltingPtC =
| BoilingPtC =
| Solubility = }}
|Section3={{Chembox Hazards
| MainHazards =
| GHSPictograms =
| GHSSignalWord =
| HPhrases =
| PPhrases =
| FlashPtC =
| AutoignitionPt = }}
|Section6={{Chembox Related
| OtherCompounds =
}}
}}
Lithium arsenide describes inorganic compounds with the chemical formula LixAs where x can range from about 0.5 to 3. A common derivative is Li3As, which is prepared by the reduction of arsenic with a solution of lithium in ammonia.{{cite book|author=E. Donges|chapter=Phosphides, Arsenides, Antimonides and Bismuthides of Alkali Metals from the Elements|title=Handbook of Preparative Inorganic Chemistry, 2nd Ed. |editor=G. Brauer|publisher=Academic Press|year=1963|place=NY, NY|volume=2|page=985}} It can also be produced by heating the elements.{{cite journal |doi=10.1002/zaac.202100358 |title=Li3As and Li3P revisited: DFT modelling on phase stability and ion conductivity |date=2022 |last1=Wegner |first1=Florian |last2=Kamm |first2=Franziska |last3=Pielnhofer |first3=Florian |last4=Pfitzner |first4=Arno |journal=Zeitschrift für Anorganische und Allgemeine Chemie |volume=648 |issue=11|doi-access=free }}
:: 3 Li + As → Li3As
Other lithium arsenides
File:26472-ICSD.png|Chain of As atoms in LiAs. The As-As distances are about 245 pm.,
File:As7 3-.svg|structure of As73- cage in Li3As7.
The arsenic-rich arsenides are often classified as zintl phases.
- Li3As7 adopts a structure akin to the heptaphosphide.{{cite journal |doi=10.1524/ncrs.2002.217.jg.485 |title=Crystal Structure of the Low-Temperature Modification of Trilithium Heptaarsenide, LT-Li3As7 |date=2002 |last1=Hönle |first1=W. |last2=Buresch |first2=J. |last3=Peters |first3=K. |last4=Chang |first4=J. H. |last5=Schnering |first5=H. G. von |journal=Zeitschrift für Kristallographie - New Crystal Structures |volume=217 |pages=485–486 |doi-access=free}}{{cite web |title=Materials Data on Li3As7 by Materials Project |date=2014 |doi=10.17188/1283621 |osti=1283621 |url=https://www.osti.gov/biblio/1283621 |author1=None Available |publisher=LBNL Materials Project; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)}}
- Lithium monoarsenide (LiAs) forms monoclinic crystals, space group P21/c,{{cite book |last1=Donnay |first1=Joseph Désiré Hubert |title=Crystal Data; Determinative Tables |date=1963 |publisher=American Crystallographic Association |page=211 |url=https://books.google.com/books?id=x5ghAQAAMAAJ&dq=Lithium+arsenide+LiAs&pg=PA211 |access-date=13 January 2022 |language=en}} cell parameters a = 0.579 nm, b = 0.524 nm, c = 1.070 nm, β = 117.4°, Z = 8.{{cite journal |last1=Cromer |first1=D. T. |title=The crystal structure of LiAs |journal=Acta Crystallographica |date=1 January 1959 |volume=12 |issue=1 |pages=36–41 |doi=10.1107/S0365110X59000111|access-date=13 January 2022|url=http://scripts.iucr.org/cgi-bin/paper?S0365110X59000111|doi-access=free |bibcode=1959AcCry..12...36C}}
References
{{Reflist}}
{{Lithium compounds}}
{{Arsenic compounds}}
{{Arsenides}}