Cadmium oxide

Cadmium oxide

chembox new
ImageFile =
ImageSize =
IUPACName = Cadmium oxide
OtherNames = Cadmium(II) oxide,
Cadmium monoxide
Section1 = Chembox Identifiers
Abbreviations =
CASNo = 1306-19-0
EINECS =
PubChem =
SMILES =
InChI =
RTECS = EV1925000
MeSHName =
ChEBI =
KEGG =
ATCCode_prefix =
ATCCode_suffix =
ATC_Supplemental =

Section2 = Chembox Properties
Cd = 1 | O = 1
Appearance = Red (pure) brown-black (impure) solid
Density = 8.150 g/cm3(Crystalline form), 6.95g/cm3 (amorphous form),cite web |url=http://www.cdc.gov/niosh/npg/npgd0088.html |accessdate=2007-02-16 |title=NIOSH Pocket Guide to Chemical Hazards |format= |work= ] solid.
MeltingPt = 1427 °C
Melting_notes = 900-1000°C.cite web |url=http://www.inchem.org/documents/icsc/icsc/eics0117.htm |accessdate=2007-02-16 |title=INCHEM: Chemical Safety Information from Intergovernmental Organizations |format= |work= ]
BoilingPt = 1559 °C
Boiling_notes = Sublimates [http://www.inchem.org/documents/icsc/icsc/eics0117.htm Cadmium Oxide (Icsc) ] ]
Solubility = Insoluble
Solubility1 =
Solvent1 =
Solubility2 =
Solvent2 =
SolubleOther = degrades
Solvent = acid and alkaline
pKa =
pKb =
IsoelectricPt =
LambdaMax =
Absorbance =
ThermalConductivity = 0.7 W/m-K
MagSus = -3e-005 cm3/mol
SpecRotation =
RefractIndex =
Bandg

ElectronMobility = 531 cm²/V-s
Viscosity =
Dipole =

Section3 = Chembox Structure
CrystalStruct = Cubic
LattConst_a = 4.6958 Å
Coordination =
MolShape =

Section4 = Chembox Thermochemistry
DeltaHf =
DeltaHc =
Entropy =
HeatCapacity =

Section5 = Chembox Pharmacology
AdminRoutes =
Bioavail =
Metabolism =
HalfLife =
ProteinBound =
Excretion =
Legal_status =
Legal_US =
Legal_UK =
Legal_AU =
Legal_CA =
PregCat =
PregCat_AU =
PregCat_US =

Section6 = Chembox Explosive
ShockSens =
FrictionSens =
ExplosiveV =
REFactor =

Section7 = Chembox Hazards
ExternalMSDS = [http://physchem.ox.ac.uk/MSDS/CA/cadmium_oxide External MSDS Data Sheet]
EUClass = Toxic Carc. Cat. 2 Muta. Cat. 3 Repr. Cat. 3 Dangerous for the environment
EUIndex =
MainHazards =
NFPA-H = 3
NFPA-F = 0
NFPA-R = 0
NFPA-O =
RPhrases = R23, R24, R25, R37,
R45
SPhrases = S46, S39, S36, S35,
S29, S1
RSPhrases =
FlashPt = Non-flammable
Autoignition =
ExploLimits =
PEL =
IDLH =

Section8 = Chembox Related
OtherAnions = Cadmium selenide
OtherCations = Zinc oxide Mercury oxide
OtherFunctn =
Function =
OtherCpds =

Cadmium oxide is an inorganic compound with the formula CdO. CdO is one of the main precursors to other cadmium compounds It crystallizes in a cubic lattice like sodium chloride, with octahedral cation and anion centers. [Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.] It rarely occurs naturally as the mineral monteponite.

Production and structure

Since cadmium compounds are often found in association with zinc ores, cadmium oxide is a common by-product of zinc refining. [cite web |url=http://www.npi.gov.au/database/substance-info/profiles/17.html |title=Cadmium and compounds fact sheet |accessdate=2007-02-16 |format= |work= ] . It is produced by burning elemental cadmium in air. Pyrolysis of other cadmium compounds, such as the nitrate or the carbonate, also affords this oxide. When pure, it is red but CdO is unusual in being available in many differing colours due to its tendency to form defect structures resulting from anion vacancies. [Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.]

Reactivity

CdO is a basic oxide and is thus attacked by aqueous acids to give solutions of [Cd(H2O)6] 2+. Upon treatment with strong alkaline solutions, [Cd(OH)4] 2- forms.

Health Risks

Cadmium compounds are considered carcinogenic. Consult MSDS.cite web |url=http://www.hse.gov.uk/pubns/indg391.pdf |title=INDG391 - Cadmium and you - working with Cadmium - are you at risk ?|accessdate=2007-02-16 |format=PDF |work=UK Health and Safety Executive Leaflet ]

References

External links

* [http://www.webelements.com/webelements/compounds/text/Cd/Cd1O1-1306190.html Cadmium(II) oxide information at Webelements] .


Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • cadmium oxide — noun A colorless amorphous powder; a red or brown colored crystal …   Wiktionary

  • Cadmium telluride — Other names Irtran 6 Identifiers …   Wikipedia

  • cadmium — cadmic, adj. /kad mee euhm/, n. a white, ductile divalent metallic element resembling tin, used in plating and in making certain alloys. Symbol: Cd; at. wt.: 112.41; at. no.: 48; sp. gr. 8.6 at 20°C. [1815 25; < NL, equiv. to L cadm(ia) calamine… …   Universalium

  • Cadmium sulfide — Chembox new Name = Cadmium sulfide ImageFile = Hawleyite 3D balls.png ImageSize = 150px ImageName = 3D model of the structure of hawleyite ImageFile1 = Greenockite 3D balls.png ImageSize1 = 150px ImageName1 = 3D model of the structure of… …   Wikipedia

  • Cadmium chloride — Chembox new Name = Cadmium chloride ImageFile = Cadmium chloride hemipentahydrate.jpg ImageName = Cadmium chloride hemipentahydrate ImageFile1 = Cadmium chloride 3D balls.png ImageName1 = Cadmium chloride ImageFile2 = Cadmium chloride 3D… …   Wikipedia

  • cadmium —    A metal found in several compounds: cadmium oxide, cadmium carbonate, cadmium chloride, cadmium sulfate, and cadmium sulfide. In paints, inks, enamels, glazes, and dyes, and permanent pigments (reds, oranges, and yellows) are prepared from… …   Glossary of Art Terms

  • Cadmium — (pronEng|ˈkædmiəm) is a chemical element with the symbol Cd and atomic number 48. A relatively abundant (price 3.55 USD/lb as of 2008 02 15), soft, bluish white, transition metal, cadmium is known to cause cancer and occurs with zinc ores.… …   Wikipedia

  • Cadmium — Eigenschaften …   Deutsch Wikipedia

  • Cadmium telluride solar cell — Articleissues advert = October 2008 COI = October 2008 wikify = October 2008A cadmium telluride solar cell is a solar cell based on a cadmium telluride (CdTe) thin film, a semiconductor layer to absorb and convert sunlight into electricity… …   Wikipedia

  • oxide — oxidic /ok sid ik/, adj. /ok suyd, sid/, n. Chem. a compound in which oxygen is bonded to one or more electropositive atoms. Also, oxid /ok sid/. [1780 90; < F (now oxyde), b. oxygène and acide. See OXYGEN, ACID] * * * I Any of a large and… …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”