Lead(II) iodide

Lead(II) iodide
Lead(II) iodide
Names
Other names
Plumbous iodide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.220 Edit this at Wikidata
EC Number
  • 233-256-9
UNII
UN number 2291 3077
  • InChI=1S/2HI.Pb/h2*1H;/q;;+2/p-2 checkY
    Key: RQQRAHKHDFPBMC-UHFFFAOYSA-L checkY
  • InChI=1/2HI.Pb/h2*1H;/q;;+2/p-2
    Key: RQQRAHKHDFPBMC-NUQVWONBAP
  • I[Pb]I
Properties
PbI
2
Molar mass 461.01 g/mol
Appearance bright yellow powder
Odor odorless
Density 6.16 g/cm3[1]
Melting point 410 °C (770 °F; 683 K)[1]
Boiling point 872 °C (1,602 °F; 1,145 K) decomp.[1]
  • 0.44 g/L (0 °C)
  • 0.76 g/L (20 °C)[1][2]
  • 4.1 g/L (100 °C)[3][4]
4.41×10−9 (20 °C)
Solubility
Band gap 2.34 eV (direct)[6][7]
−126.5·10−6 cm3/mol[8]
Structure[9]
Hexagonal hP6
P63mc, No. 186
a = 0.4556 nm, b = 0.4556 nm, c = 1.3973 nm
α = 90°, β = 90°, γ = 120°°
2
octahedral
Thermochemistry[10]
77.4 J/(mol·K)
174.9 J/(mol·K)
-175.5 kJ/mol
-173.6 kJ/mol
Hazards
GHS labelling:
GHS07: Exclamation markGHS08: Health hazardGHS09: Environmental hazard
Danger
H302, H332, H360, H373, H410
P201, P202, P260, P261, P264, P270, P271, P273, P281, P301+P312, P304+P312, P304+P340, P308+P313, P312, P314, P330, P391, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 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
3
0
0
Flash point Non-flammable
Related compounds
Other anions
Other cations
 Tin(II) iodide
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Lead(II) iodide (or lead iodide) is a chemical compound with the formula PbI
2. At room temperature, it is a bright yellow odorless crystalline solid, that becomes orange and red when heated.[11] It was formerly called plumbous iodide.

The compound currently has a few specialized applications, such as the manufacture of solar cells,[12] X-rays and gamma-ray detectors.[13] Its preparation is an entertaining and popular demonstration in chemistry education, to teach topics such as precipitation reactions and stoichiometry.[14] It is decomposed by light at temperatures above 125 °C (257 °F), and this effect has been used in a patented photographic process.[4][15]

Lead iodide was formerly employed as a yellow pigment in some paints, with the name iodide yellow. However, that use has been largely discontinued due to its toxicity and poor stability.[16]

  1. ^ a b c d e Haynes (2016), p. 4.69.
  2. ^ Clever, H. L.; Johnston, F. J. (1980). "The Solubility of Some Sparingly Soluble Lead Salts: An Evaluation of the Solubility in Water and Aqueous Electrolyte Solution" (PDF). J. Phys. Chem. Ref. Data (NIST data review). 9 (3): 751–784. Bibcode:1980JPCRD...9..751C. doi:10.1063/1.555628. Archived from the original (PDF) on 2014-02-11. Retrieved 2017-07-13.
  3. ^ Haynes (2016), p. 5.171.
  4. ^ a b Cite error: The named reference patnaik was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference west was invoked but never defined (see the help page).
  6. ^ Ahuja, R.; Arwin, H.; Ferreira Da Silva, A.; Persson, C.; Osorio-Guillén, J. M.; Souza De Almeida, J.; Moyses Araujo, C.; Veje, E.; Veissid, N.; An, C. Y.; Pepe, I.; Johansson, B. (2002). "Electronic and optical properties of lead iodide". Journal of Applied Physics. 92 (12): 7219–7224. Bibcode:2002JAP....92.7219A. doi:10.1063/1.1523145. hdl:10495/11556. S2CID 29398039.
  7. ^ Zhong, Mianzeng; Zhang, Shuai; Huang, Le; You, Jingbi; Wei, Zhongming; Liu, Xinfeng; Li, Jingbo (2017). "Large-scale 2D PbI2 monolayers: experimental realization and their indirect band-gap related properties". Nanoscale. 9 (11): 3736–3741. doi:10.1039/c6nr07924e. PMID 28102404.
  8. ^ Haynes (2016), p. 4.128.
  9. ^ Brixner, L.H.; Chen, H.-Y.; Foris, C.M. (1981). "X-ray study of the PbCl2−xIx and PbBr2−xIx systems". Journal of Solid State Chemistry. 40 (3): 336–343. Bibcode:1981JSSCh..40..336B. doi:10.1016/0022-4596(81)90400-X.
  10. ^ Haynes (2016), p. 5.24.
  11. ^ Cite error: The named reference sigma was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Dhiaputra was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Shah was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference anthony was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference patphot was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Eastaugh was invoked but never defined (see the help page).