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	{{chembox		{{chembox
		⚫	| verifiedrevid = 418541969
	| Watchedfields = changed
		⚫	| ImageFile = Magnesium-diboride-3D-balls.png
⚫	| verifiedrevid = 399501392
⚫	| ImageFile = Magnesium-diboride-3D-balls.png
	| ImageSize =		| ImageSize =
	| IUPACName = aluminium diboride		| IUPACName = aluminium diboride
	| OtherNames = aluminium boride<br>aluminum diboride		| OtherNames = aluminium boride
	| Section1 = {{Chembox Identifiers		|Section1={{Chembox Identifiers
	| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}		| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
	| ChemSpiderID = 21171253		| ChemSpiderID = 21171253
			| PubChem = 24884166
	| InChI = 1/Al.B2/c;1-2/q-2;+2/rAlB2/c1-2-3-1		| InChI = 1/Al.B2/c;1-2/q-2;+2/rAlB2/c1-2-3-1
	| InChIKey = XGNZNBRDPPLKTC-DOGMWQOPAK		| InChIKey = XGNZNBRDPPLKTC-DOGMWQOPAK
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	| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}		| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
	| StdInChIKey = XGNZNBRDPPLKTC-UHFFFAOYSA-N		| StdInChIKey = XGNZNBRDPPLKTC-UHFFFAOYSA-N
			| CASNo_Ref = {{cascite|correct|??}}
	| CASNo = 12041-50-8		| CASNo = 12041-50-8
	| EINECS = 234-923-7		| EINECS = 234-923-7
	| SMILES = B1=B1		| SMILES = B1=B1
	}}		}}
	| Section2 = {{Chembox Properties		|Section2={{Chembox Properties
	| Formula = AlB<sub>2</sub>		| Formula = AlB<sub>2</sub>
	| MolarMass = 48.604 g/mol		| MolarMass = 48.604 g/mol<ref name=b92>{{RubberBible92nd|page=4.45}}</ref>
	| Appearance = Copper-red solid		| Appearance = Copper-red solid
	| Density = 3.19 g/cm³		| Density = 3.19 g/cm<sup>3</sup><ref name=b92/>
			| MeltingPt = >920 °C
	| MeltingPtC = 1655
			| MeltingPt_notes = (decomposes)<ref name=b92/>
	| BoilingPt =		| BoilingPt =
	| Solubility = Insoluble in water		| Solubility = insoluble
	}}		}}
	| Section3 = {{Chembox Structure		|Section3={{Chembox Structure
			| Structure_ref =<ref>{{cite journal|doi=10.1021/ja01604a003|title=The Preparation of Aluminium Diboride, AlB21|journal=Journal of the American Chemical Society|volume=78|issue=23|pages=5977–5978|year=1956|last1=Felten|first1=Edward J}}</ref>
	| CrystalStruct = Hexagonal, ]		| CrystalStruct = Hexagonal, ]
	| SpaceGroup = P6/mmm, No. 191		| SpaceGroup = P6/mmm, No. 191
			| LattConst_a = 0.3009 nm
			| LattConst_b = 0.3009 nm
			| LattConst_c = 0.3262 nm,
			| LattConst_alpha = 90
			| LattConst_beta = 90
			| LattConst_gamma = 120
			| UnitCellFormulas =1
			}}
			|Section4={{Chembox Thermochemistry
			| DeltaHf = -151 kJ/mol
			| Entropy = 34.7 J/mol K
			| HeatCapacity = 43.6 J/mol K
	}}		}}
	| Section7 = {{Chembox Hazards		|Section7={{Chembox Hazards
	| MainHazards =		| MainHazards =
	| FlashPt =		| FlashPt =
	| Autoignition =		| AutoignitionPt =
	}}		}}
	}}		}}
	'''Aluminium diboride''' (AlB<sub>2</sub>) is a ] made from the metal ] and the non-metal ]. It is one of two compounds of aluminium and boron, the other being ] that are both commonly referred to as aluminium boride.		'''Aluminium diboride''' (AlB<sub>2</sub>) is a ] made from the metal ] and the ] ]. It is one of two compounds of aluminium and boron, the other being ], which are both commonly referred to as aluminium boride.
	Structurally the B atoms form ] like sheets with Al atoms between them, and this is very similar to the structure of ]. Single crystals of AlB<sub>2</sub> exhibit metallic conductivity along the axis parallel to the basal hexagonal plane.<ref> "On the electronic and structural properties of aluminum diboride Al<sub>0.9</sub>B<sub>2</sub>" Burkhardt, Ulrich; Gurin, Vladimir; Haarmann, Frank; Borrmann, Horst; Schnelle, Walter; Yaresko, Alexander; Grin, Yuri </ref>		Structurally the B atoms form ]-like sheets with Al atoms between them, and this is very similar to the structure of ]. Single crystals of AlB<sub>2</sub> exhibit metallic conductivity along the axis parallel to the basal hexagonal plane.<ref>{{cite journal|title=On the electronic and structural properties of aluminium diboride Al<sub>0.9</sub>B<sub>2</sub>|journal=Journal of Solid State Chemistry |volume=177 |issue=2 |pages=389 |doi=10.1016/j.jssc.2002.12.001 |year=2004 |last1=Burkhardt |first1=U |last2=Gurin |first2=Vladimir |last3=Haarmann |first3=Frank |last4=Borrmann |first4=Horst |last5=Schnelle |first5=Walter |last6=Yaresko |first6=Alexander |last7=Grin |first7=Yuri |bibcode=2004JSSCh.177..389B }}</ref>
	Aluminium boride is considered a hazardous substance as it reacts with ]s and ] gas to produce toxic gases. For example, it reacts with hydrochloric acid to release borane and aluminium chloride.		Aluminium boride is considered a hazardous substance as it reacts with ]s and ] gas to produce toxic gases. For example, it reacts with hydrochloric acid to release ] and ].
			The crystal structure of AlB<sub>2</sub> is often used as a prototype structure to describe ]. There are a large number of ]s that fall within the AlB<sub>2</sub> structural family.<ref>{{cite journal | last1=Hoffmann | first1=R.-D. | last2=Pöttgen | first2=Rainer | title=AlB<sub>2</sub>-related intermetallic compounds – a comprehensive view based on group-subgroup relations | journal=Zeitschrift für Kristallographie - Crystalline Materials | publisher=Walter de Gruyter GmbH | volume=216 | issue=3 | date=2001-01-01 | pages=127–145 | issn=2196-7105 | doi=10.1524/zkri.216.3.127.20327 | bibcode=2001ZK....216..127H | s2cid=98251655 }}</ref>
	==See also==		==See also==
	]		*]
⚫	==External links==
⚫	*;
	== References ==		== References ==
	{{reflist}}		{{reflist}}
		⚫	==External links==
		⚫	*;
	{{Aluminium compounds}}		{{Aluminium compounds}}
			{{Borides}}
	]		]
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	{{Inorganic-compound-stub}}		{{Inorganic-compound-stub}}
	]
	]