magnesium fluoride

{{Short description|Chemical compound of magnesium and fluorine}}

{{chembox

| Watchedfields = changed

| verifiedrevid = 477000602

| Name = Magnesium fluoride

| Reference =

{{Citation

|chapter-url=https://archive.org/details/CRCHandbookOfChemistryAndPhysics97thEdition2016/page/n789

|chapter=Physical Constants of Inorganic Compounds

| year = 2016

| title = Handbook of Chemistry and Physics

| edition = 97th

|editor=W.M. Haynes

| publisher = CRC Press

| isbn = 978-1-4987-5429-3

| pages = 4–71 (789)}}

| ImageFile = Magnesium-fluoride-unit-cell-3D-bs-17.png

| ImageSize =

| ImageName = Magnesium fluoride

| OtherNames = Sellaite
Irtran-1

|Section1={{Chembox Identifiers

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 22952

| InChI = 1/2FH.Mg/h2*1H;/q;;+2/p-2

| InChIKey = ORUIBWPALBXDOA-NUQVWONBAK

| SMILES = F[Mg]F

| SMILES2 = [Mg+2].[F-].[F-]

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/2FH.Mg/h2*1H;/q;;+2/p-2

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = ORUIBWPALBXDOA-UHFFFAOYSA-L

| CASNo = 7783-40-6

| CASNo_Ref = {{cascite|correct|CAS}}

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = 5N014C7IWU

| PubChem = 24546

| RTECS = OM3325000

| EINECS = 231-995-1

}}

|Section2={{Chembox Properties

| Formula = {{chem2|MgF2}}

| MolarMass = 62.3018 g/mol

| Appearance = Colorless to white tetragonal crystals

| Density = 3.148 g/cm³

| Solubility = 0.013 g/(100 mL)

| SolubilityProduct = 5.16⋅10⁻¹¹

| SolubleOther = {{ubl|Soluble in nitric acid|Slightly soluble in acetone|Insoluble in ethanol}}

| MeltingPtC = 1263

| BoilingPtC = 2260

| RefractIndex = 1.37397

| MagSus = −22.7⋅10⁻⁶ cm³/mol

}}

|Section3={{Chembox Structure

| CrystalStruct = Rutile (tetragonal), tP6

| SpaceGroup = P4₂/mnm, No. 136

}}

|Section4={{Chembox Thermochemistry

| DeltaHf = −1124.2 kJ/mol

| DeltaHc =

| DeltaGf = −1071 kJ/mol

| Entropy = 57.2 J/(mol⋅K)

| HeatCapacity = 61.6 J/(mol⋅K)

}}

|Section7={{Chembox Hazards

| Hazards_ref = {{Cite web|url=http://www.sciencelab.com/msds.php?msdsId=9924548|title=Magnesium Fluoride Material Safety Data Sheet|date=May 21, 2013|website=Science Labs|access-date=October 13, 2017}}{{Cite web|url=http://www.chemicalbook.com/ChemicalProductProperty_EN_CB8716701.htm|title=Magnesium fluoride|website=CAS DataBase List|publisher=ChemicalBook|access-date=October 13, 2017}}

| ExternalSDS = [http://www.chemicalbook.com/ChemicalProductProperty_EN_CB8716701.htm ChemicalBook]

| GHSPictograms = {{GHS07|Irritant}}

| GHSSignalWord = WARNING

| HPhrases = {{H-phrases|303|315|319|335}}

| PPhrases = {{P-phrases|261|304+340|305+351+338|405}}

| LD50 = 2330{{clarify|What is the unit of measurement??? Miligram per kilogram? Gram per kilogram? Miligram per gram? Frogs per maa gramma???|date=February 2023}} (rat, oral)

| NFPA-H = 3

| NFPA-F = 0

| NFPA-R = 0

| NFPA-S =

}}

|Section8={{Chembox Related

| OtherAnions = {{ubl|Magnesium chloride|Magnesium bromide|Magnesium iodide}}

| OtherCations = {{ubl|Beryllium fluoride|Calcium fluoride|Strontium fluoride|Barium fluoride|Radium fluoride}}

| OtherCompounds = {{ubl|Hydrogen fluoride|Zinc fluoride|Aluminium fluoride}}

}}

}}

Magnesium fluoride is an ionically bonded inorganic compound with the formula {{chem2|MgF2|auto=1}}. The compound is a colorless to white crystalline salt and is transparent over a wide range of wavelengths, with commercial uses in optics that are also used in space telescopes. It occurs naturally as the rare mineral sellaite.