Tin(IV) oxide

Tin(IV) oxide
Names
	IUPAC name Tin (IV) Oxide
	Other names Stannic oxide, Tin(IV) oxide, Flowers of tin, Cassiterite
Identifiers
CAS Number	18282-10-5 ; 13472-47-4 (hydrate) ;
3D model (JSmol)	(O=Sn=O): Interactive image;
ChemSpider	26988 ;
ECHA InfoCard	100.038.311
EC Number	242-159-0;
PubChem CID	29011;
RTECS number	XQ4000000;
UNII	KM7N50LOS6 ;
CompTox Dashboard (EPA)	DTXSID201316016 DTXSID8042474, DTXSID201316016 ;
	InChI InChI=1S/2O.Sn Key: XOLBLPGZBRYERU-UHFFFAOYSA-N ;
	SMILES (O=Sn=O): O=[Sn]=O;
Properties
Chemical formula	O2Sn
Molar mass	150.708 g·mol−1
Appearance	Yellowish or light grey powder
Odor	Odorless
Density	6.95 g/cm3 (20 °C); 6.85 g/cm3 (24 °C)
Melting point	1,630 °C (2,970 °F; 1,900 K)
Boiling point	1,800–1,900 °C (3,270–3,450 °F; 2,070–2,170 K) ; Sublimes
Solubility in water	Insoluble
Solubility	Soluble in hot concentrated alkalis, concentrated acids; Insoluble in alcohol
Magnetic susceptibility (χ)	−4.1·10−5 cm3/mol
Refractive index (nD)	2.006
Structure
Crystal structure	Rutile tetragonal, tP6
Space group	P42/mnm, No. 136
Point group	4/m 2/m 2/m
Lattice constant	a = 4.737 Å, c = 3.185 Å α = 90°, β = 90°, γ = 90°
Coordination geometry	Octahedral (Sn4+); Trigonal planar (O2−)
Thermochemistry
Heat capacity (C)	52.6 J/mol·K
Std molar; entropy (S⦵298)	49.04 J/mol·K
Std enthalpy of; formation (ΔfH⦵298)	−577.63 kJ/mol
Gibbs free energy (ΔfG⦵)	−515.8 kJ/mol
Hazards
NFPA 704 (fire diamond)	1 0 0
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	> 20 g/kg (rats, oral)
	NIOSH (US health exposure limits):
PEL (Permissible)	none
REL (Recommended)	TWA 2 mg/m3
IDLH (Immediate danger)	N.D.
Safety data sheet (SDS)	ICSC 0954
Related compounds
Related tin oxides	Tin(II) oxide
	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

Tin(IV) oxide, also known as stannic oxide, is the inorganic compound with the formula SnO₂. The mineral form of SnO₂ is called cassiterite, and this is the main ore of tin.^[9] With many other names, this oxide of tin is an important material in tin chemistry. It is a colourless, diamagnetic, amphoteric solid.

^ Cite error: The named reference mfa was invoked but never defined (see the help page).
^ ^a ^b ^c ^d NIOSH Pocket Guide to Chemical Hazards. "#0616". National Institute for Occupational Safety and Health (NIOSH).
^ ^a ^b ^c ^d CID 29011 from PubChem
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.
^ Pradyot, Patnaik (2003). Handbook of Inorganic Chemicals. The McGraw-Hill Companies, Inc. p. 940. ISBN 0-07-049439-8.
^ ^a ^b ^c ^d Baur, W.H. (1956). "Über die Verfeinerung der Kristallstrukturbestimmung einiger Vertreter des Rutiltyps: TiO₂, SnO₂, GeO₂ und MgF₂". Acta Crystallographica. 9 (6): 515–520. Bibcode:1956AcCry...9..515B. doi:10.1107/S0365110X56001388.
^ ^a ^b Stannic oxide in Linstrom, Peter J.; Mallard, William G. (eds.); NIST Chemistry WebBook, NIST Standard Reference Database Number 69, National Institute of Standards and Technology, Gaithersburg (MD) (retrieved July 4, 2014)
^ ^a ^b "MSDS of Tin(IV) oxide". fishersci.ca. Fisher Scientific. Retrieved July 4, 2014.
^ Greenwood, Norman N.; Earnshaw, Alan (1984). Chemistry of the Elements. Oxford: Pergamon Press. pp. 447–48. ISBN 978-0-08-022057-4.

[mfa-1] Cite error: The named reference mfa was invoked but never defined (see the help page).

[PGCH-2] NIOSH Pocket Guide to Chemical Hazards. "#0616". National Institute for Occupational Safety and Health (NIOSH).

[pubchem-3] CID 29011 from PubChem

[crc-4] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.

[pphoic-5] Pradyot, Patnaik (2003). Handbook of Inorganic Chemicals. The McGraw-Hill Companies, Inc. p. 940. ISBN 0-07-049439-8.

[iucruber-6] Baur, W.H. (1956). "Über die Verfeinerung der Kristallstrukturbestimmung einiger Vertreter des Rutiltyps: TiO₂, SnO₂, GeO₂ und MgF₂". Acta Crystallographica. 9 (6): 515–520. Bibcode:1956AcCry...9..515B. doi:10.1107/S0365110X56001388.

[nist-7] Stannic oxide in Linstrom, Peter J.; Mallard, William G. (eds.); NIST Chemistry WebBook, NIST Standard Reference Database Number 69, National Institute of Standards and Technology, Gaithersburg (MD) (retrieved July 4, 2014)

[fca-8] "MSDS of Tin(IV) oxide". fishersci.ca. Fisher Scientific. Retrieved July 4, 2014.

[Greenwood-9] Greenwood, Norman N.; Earnshaw, Alan (1984). Chemistry of the Elements. Oxford: Pergamon Press. pp. 447–48. ISBN 978-0-08-022057-4.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]