Tin(IV) oxide
| Names | |
|---|---|
| IUPAC name
Tin (IV) Oxide
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| Other names
Stannic oxide, Tin(IV) oxide, Flowers of tin,[1] Cassiterite
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| Identifiers | |
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3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.038.311 |
| EC Number |
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PubChem CID
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| RTECS number |
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| UNII | |
CompTox Dashboard (EPA)
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SMILES
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| 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] |
Magnetic susceptibility (χ)
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−4.1·10−5 cm3/mol[4] |
Refractive index (nD)
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2.006[5] |
| Structure | |
| Rutile tetragonal, tP6[6] | |
| P42/mnm, No. 136[6] | |
| 4/m 2/m 2/m[6] | |
Lattice constant
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a = 4.737 Å, c = 3.185 Å[6] α = 90°, β = 90°, γ = 90°
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Coordination geometry
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Octahedral (Sn4+) Trigonal planar (O2−) |
| Thermochemistry | |
Heat capacity (C)
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52.6 J/mol·K[4] |
Std molar
entropy (S⦵298) |
49.04 J/mol·K[4][7] |
Std enthalpy of
formation (ΔfH⦵298) |
−577.63 kJ/mol[4][7] |
Gibbs free energy (ΔfG⦵)
|
−515.8 kJ/mol[4] |
| Hazards | |
| NFPA 704 (fire diamond) | |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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> 20 g/kg (rats, oral)[8] |
| NIOSH (US health exposure limits): | |
PEL (Permissible)
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none[2] |
REL (Recommended)
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TWA 2 mg/m3[2] |
IDLH (Immediate danger)
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N.D.[2] |
| Safety data sheet (SDS) | ICSC 0954 |
| Related compounds | |
| Tin(II) oxide | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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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.
- ^ Cite error: The named reference
mfawas 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.