Magnesium fluoride

Magnesium fluoride^[1]
Names
	Other names Sellaite; Irtran-1
Identifiers
CAS Number	7783-40-6 ;
3D model (JSmol)	Interactive image; Interactive image;
ChemSpider	22952 ;
ECHA InfoCard	100.029.086
EC Number	231-995-1;
PubChem CID	24546;
RTECS number	OM3325000;
UNII	5N014C7IWU ;
CompTox Dashboard (EPA)	DTXSID7052523 ;
	InChI InChI=1S/2FH.Mg/h21H;/q;;+2/p-2 Key: ORUIBWPALBXDOA-UHFFFAOYSA-L ; InChI=1/2FH.Mg/h21H;/q;;+2/p-2 Key: ORUIBWPALBXDOA-NUQVWONBAK;
	SMILES F[Mg]F; [Mg+2].[F-].[F-];
Properties
Chemical formula	MgF2
Molar mass	62.3018 g/mol
Appearance	White tetragonal crystals
Density	3.148 g/cm3
Melting point	1,263 °C (2,305 °F; 1,536 K)
Boiling point	2,260 °C (4,100 °F; 2,530 K)
Solubility in water	0.013 g/(100 mL)
Solubility product (Ksp)	5.16⋅10−11
Solubility	Soluble in nitric acid; Slightly soluble in acetone; Insoluble in ethanol;
Magnetic susceptibility (χ)	−22.7⋅10−6 cm3/mol
Refractive index (nD)	1.37397
Structure
Crystal structure	Rutile (tetragonal), tP6
Space group	P42/mnm, No. 136
Thermochemistry
Heat capacity (C)	61.6 J⋅mol−1⋅K−1
Std molar; entropy (S⦵298)	57.2 J⋅mol−1⋅K−1
Std enthalpy of; formation (ΔfH⦵298)	−1124.2 kJ⋅mol−1
Gibbs free energy (ΔfG⦵)	−1071 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H303, H315, H319, H335
Precautionary statements	P261, P304+P340, P305+P351+P338, P405
NFPA 704 (fire diamond)	3 0 0
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	2330[clarification needed] (rat, oral)
Safety data sheet (SDS)	ChemicalBook
Related compounds
Other anions	Magnesium chloride; Magnesium bromide; Magnesium iodide;
Other cations	Beryllium fluoride; Calcium fluoride; Strontium fluoride; Barium fluoride; Radium fluoride;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Magnesium fluoride is an ionically bonded inorganic compound with the formula Mg F₂. The compound is a 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.

^ W.M. Haynes, ed. (2016), "Physical Constants of Inorganic Compounds", Handbook of Chemistry and Physics (97th ed.), CRC Press, pp. 4–71 (789), ISBN 978-1-4987-5429-3
^ "Magnesium Fluoride Material Safety Data Sheet". Science Labs. May 21, 2013. Retrieved October 13, 2017.
^ "Magnesium fluoride". CAS DataBase List. ChemicalBook. Retrieved October 13, 2017.

[hand-1] W.M. Haynes, ed. (2016), "Physical Constants of Inorganic Compounds", Handbook of Chemistry and Physics (97th ed.), CRC Press, pp. 4–71 (789), ISBN 978-1-4987-5429-3

[2] "Magnesium Fluoride Material Safety Data Sheet". Science Labs. May 21, 2013. Retrieved October 13, 2017.

[3] "Magnesium fluoride". CAS DataBase List. ChemicalBook. Retrieved October 13, 2017.

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[2]

[3]

Names

Other names Sellaite Irtran-1
Identifiers
CAS Number	7783-40-6^Y
3D model (JSmol)	Interactive image Interactive image
ChemSpider	22952^Y
ECHA InfoCard	100.029.086
EC Number	231-995-1
PubChem CID	24546
RTECS number	OM3325000
UNII	5N014C7IWU^Y
CompTox Dashboard (EPA)	DTXSID7052523
InChI InChI=1S/2FH.Mg/h21H;/q;;+2/p-2^Y Key: ORUIBWPALBXDOA-UHFFFAOYSA-L^Y InChI=1/2FH.Mg/h21H;/q;;+2/p-2 Key: ORUIBWPALBXDOA-NUQVWONBAK
SMILES F[Mg]F [Mg+2].[F-].[F-]
Properties
Chemical formula	MgF₂
Molar mass	62.3018 g/mol
Appearance	White tetragonal crystals
Density	3.148 g/cm³
Melting point	1,263 °C (2,305 °F; 1,536 K)
Boiling point	2,260 °C (4,100 °F; 2,530 K)
Solubility in water	0.013 g/(100 mL)
Solubility product (K_sp)	5.16⋅10⁻¹¹
Solubility	Soluble in nitric acid Slightly soluble in acetone Insoluble in ethanol
Magnetic susceptibility (χ)	−22.7⋅10⁻⁶ cm³/mol
Refractive index (n_D)	1.37397
Structure
Crystal structure	Rutile (tetragonal), tP6
Space group	P4₂/mnm, No. 136
Thermochemistry
Heat capacity (C)	61.6 J⋅mol⁻¹⋅K⁻¹
Std molar entropy (S^⦵₂₉₈)	57.2 J⋅mol⁻¹⋅K⁻¹
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	−1124.2 kJ⋅mol⁻¹
Gibbs free energy (Δ_fG^⦵)	−1071 kJ/mol
Hazards^[2]^[3]
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H303, H315, H319, H335
Precautionary statements	P261, P304+P340, P305+P351+P338, P405
NFPA 704 (fire diamond)	3 0 0
Lethal dose or concentration (LD, LC):
LD₅₀ (median dose)	2330^{[clarification needed]} (rat, oral)
Safety data sheet (SDS)	ChemicalBook
Related compounds
Other anions	Magnesium chloride Magnesium bromide Magnesium iodide
Other cations	Beryllium fluoride Calcium fluoride Strontium fluoride Barium fluoride Radium fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references