查看“︁亚铬酸亚铁”︁的源代码

{{Chembox
| ImageFile = ChromiteUSGOV.jpg
| ImageSize = 250px
| IUPACName = Iron(2+) chromite
| OtherNames = 
| Section1 = {{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = 1308-31-2
| PubChem = 166600
| RTECS = GB4000000
| EINECS = 215-159-3 
| ChemSpiderID =
| SMILES = [O-2].[O-2].[O-2].[Cr+3].[Fe+3]
| InChI = 1S/Cr.Fe.3O/q2*+3;3*-2
| InChIKey = HEQBUZNAOJCRSL-UHFFFAOYSA-N
| StdInChI = 
| StdInChIKey = 
  }}
| Section2 = {{Chembox Properties
|  Formula = FeCr<sub>2</sub>O<sub>4</sub>
|  MolarMass = 223.83 g/mol
|  Appearance = 棕黑色固体
|  Density = 4.97 g/cm<sup>3</sup>
|  MeltingPtCH = 2270
|  MeltingPtCL = 2190 
|  BoilingPt = 
|  Solubility = 不溶性
|  SolubleOther = 在酸中微溶
|  RefractIndex = 2.16
  }}
| Section3 = {{Chembox Structure
|  CrystalStruct = 立方 
 }}
| Section4 = {{Chembox Hazards
|  MainHazards = 
|  FlashPt = 
|  Autoignition =
  }}
}}

'''亚铬酸亚铁'''是[[离子化合物]]，[[化学式]]为FeCr<sub>2</sub>O<sub>4</sub>。

== 制备 ==
* 自然界中存在于[[铬铁矿]]，虽然有许多杂质。

* 高温灼烧[[三氧化二铬]]与[[氧化铁]]：
:<math>\mathsf{FeO + Cr_2O_3 \ \xrightarrow{1600^oC}\ Fe(CrO_2)_2 }</math>

== 物理性质 ==
黑褐色[[立方晶系|立方晶体]]，[[空间群]]'''''F d3m'''''，其中''a'' = 0.8374 nm，Z = 8。

== 化学性质 ==
* 与浓[[盐酸]]反应：
:<math>\mathsf{Fe(CrO_2)_2 + 8HCl \ \xrightarrow{}\ 2CrCl_3 + FeCl_2 + 4H_2O }</math>

* 与热的浓[[硝酸]]反应：
:<math>\mathsf{Fe(CrO_2)_2 + 10HNO_3 \ \xrightarrow{}\ 2Cr(NO_3)_3 + Fe(NO_3)_3 + NO_2\uparrow + 5H_2O }</math>

* 在不活泼气体保护下，缓慢溶于碱中：
:<math>\mathsf{Fe(CrO_2)_2 + 6NaOH + 4H_2O \ \xrightarrow{\tau, N_2}\ 2Na_3[Cr(OH)_6] + Fe(OH)_2\downarrow }</math>

* 在空气中反应更快：
:<math>\mathsf{4Fe(CrO_2)_2 + O_2 + 24NaOH + 14H_2O \ \xrightarrow{}\ 8Na_3[Cr(OH)_6] + 4FeO(OH)\downarrow }</math>

* 被[[碳]]（[[焦炭]]）还原为铬和铁：
:<math>\mathsf{Fe(CrO_2)_2 + 4C \ \xrightarrow{1100-1200^oC}\ [Fe + 2Cr] + 4CO }</math>

== 用途 ==
作为[[铬]]的来源。<ref>{{Cite web |url=http://ull.chemistry.uakron.edu/erd/Chemicals/10000/8641.html |title=University of Akron Chemical Database |accessdate=2013-01-27 |archive-date=2012-12-15 |archive-url=https://archive.today/20121215100718/http://ull.chemistry.uakron.edu/erd/Chemicals/10000/8641.html |dead-url=no }}</ref>

== 参考文献 ==
{{reflist}}
* {{cite book
 |title = Химическая энциклопедия |editor = Редкол.: Зефиров Н.С. и др. |location = М. |publisher = Большая Российская энциклопедия
 |year = 1998 |series = 5 |pages = 783 |isbn = 5-85270-310-9
}}
* {{cite book
 |title = Справочник химика |edition = 3-е изд., испр |editor = Редкол.: Никольский Б.П. и др. |location = Л.
 |publisher = Химия |year = 1971 |series = 2 |pages = 1168
}}
* {{cite book
 |author = Лидин Р.А. и др.
 |title = Химические свойства неорганических веществ: Учеб. пособие для вузов
 |edition = 3-е изд., испр |location = М. |publisher = Химия |year = 2000 |pages = 480 |isbn = 5-7245-1163-0
}}
* {{cite book
 |author = Рипан Р., Четяну И. |title = Неорганическая химия. Химия металлов |location = М. |publisher = Мир
 |year = 1972 |series = 2 |pages = 871
}}

{{铁化合物}}

[[Category:二价铁化合物]]
[[Category:亚铬酸盐]]