Letter | Published:

Spectrum of Iodine Oxide (IO) in Flames

Nature volume 162, pages 108109 (17 July 1948) | Download Citation



BANDS attributed to iodine oxide (IO) were observed by Vaidya1 in a flame of methyl iodide, and analysed into two systems, A and B. More recently, Blake and Iredale2 have published a revised analysis for system A ; when this formula was used to arrange the bands, an obviously unsatisfactory intensity distribution was obtained. We have re-measured the bands, and extended the system to longer wavelengths. It is now found that all the bands can be arranged into one system instead of two, this system being an extension of the B system, with modified values of ν". The bands are listed in the accompanying table ; intensities are visual estimates making some allowance for variations of plate sensitivity with wave-length.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1.

    , Proc. Ind. Acad. Sci., 6 A, 122 (1937).

  2. 2.

    , and , Nature, 157, 229 (1946).

  3. 3.

    , and , Nature, 161, 242 (1948).

  4. 4.

    , and , Trans. Farad. Soc. (in the press).

Download references

Author information


  1. Chemical Engineering Department, Imperial College of Science and Technology, London, S.W.7. March 17.

    • E. H. COLEMAN
    • , A. G. GAYDON
    •  & W. M. VAIDYA


  1. Search for E. H. COLEMAN in:

  2. Search for A. G. GAYDON in:

  3. Search for W. M. VAIDYA in:

About this article

Publication history




Further reading


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.