Tin(IV) oxide

Tin(IV) oxide
3D model of tin (IV) oxide, red atom is oxide
Sample of tin (IV) oxide
Names
IUPAC name
Tin (IV) Oxide
Other names
Stannic oxide, Tin(IV) oxide, Flowers of tin,[1] Cassiterite
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.038.311 Edit this at Wikidata
EC Number
  • 242-159-0
RTECS number
  • XQ4000000
UNII
  • InChI=1S/2O.Sn ☒N
    Key: XOLBLPGZBRYERU-UHFFFAOYSA-N ☒N
  • (O=Sn=O): O=[Sn]=O
Properties
O2Sn
Molar mass 150.708 g·mol−1
Appearance Yellowish or light grey powder[2]
Odor Odorless
Density 6.95 g/cm3 (20 °C)[3]
6.85 g/cm3 (24 °C)[4]
Melting point 1,630 °C (2,970 °F; 1,900 K)[3][4]
Boiling point 1,800–1,900 °C (3,270–3,450 °F; 2,070–2,170 K)
Sublimes[3]
Insoluble[4]
Solubility Soluble in hot concentrated alkalis,[4] concentrated acids
Insoluble in alcohol[3]
−4.1·10−5 cm3/mol[4]
2.006[5]
Structure
Rutile tetragonal, tP6[6]
P42/mnm, No. 136[6]
4/m 2/m 2/m[6]
a = 4.737 Å, c = 3.185 Å[6]
α = 90°, β = 90°, γ = 90°
Octahedral (Sn4+)
Trigonal planar (O2−)
Thermochemistry
52.6 J/mol·K[4]
49.04 J/mol·K[4][7]
−577.63 kJ/mol[4][7]
−515.8 kJ/mol[4]
Hazards
NFPA 704 (fire diamond)
[8]
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
1
0
0
Lethal dose or concentration (LD, LC):
> 20 g/kg (rats, oral)[8]
NIOSH (US health exposure limits):
PEL (Permissible)
 none[2]
REL (Recommended)
 TWA 2 mg/m3[2]
IDLH (Immediate danger)
 N.D.[2]
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).
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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.

  1. ^ Cite error: The named reference mfa was invoked but never defined (see the help page).
  2. ^ a b c d NIOSH Pocket Guide to Chemical Hazards. "#0616". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ a b c d CID 29011 from PubChem
  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.
  5. ^ Pradyot, Patnaik (2003). Handbook of Inorganic Chemicals. The McGraw-Hill Companies, Inc. p. 940. ISBN 0-07-049439-8.
  6. ^ 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.
  7. ^ 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)
  8. ^ a b "MSDS of Tin(IV) oxide". fishersci.ca. Fisher Scientific. Retrieved July 4, 2014.
  9. ^ Greenwood, Norman N.; Earnshaw, Alan (1984). Chemistry of the Elements. Oxford: Pergamon Press. pp. 447–48. ISBN 978-0-08-022057-4.