Reference Spectra:

  • Oxides
  • Hydroxides
    • Ferrihydrite
    • Lepidocrocite
  • Metallic Fe
  • Spinel
    • Magnetite
    • Microbially cycled magnetite
    • Co-ferrite
  • Ferrous
    • Vivianite
    • Green Rust
  • Salts
    • Iron salts
  • Environmental
  • Microbial
    • Zetaproteobacteria
    • Photoferrotrophs

Spectra:


Residuals:



Import local spectrum:

Metadata


Sample ID:

Description:

Owner:

Temperature:

Published:
Select model:
Γ
(mm/s)
δ
(mm/s)
ΔEQ
(mm/s)
Bhf
(T)
Peak
intensity
Phase
selected
Site 1:
Site 2:
Site 3:
Site 4:

Goodness of fit Χ2:

Γ
(mm/s)
δ
(mm/s)
ΔEQ
(mm/s)
Bhf
(T)
Sigma
(mm/s)
Peak
intensity
Site 1:
Site 2:
Site 3:
Site 4:

The Voigt based model is currently under development and only partially works

Nudge Background

Basic File information: (In development)

To export table, type in a filename ending .csv and press Save (e.g. output.csv):

The Mössbauer effect visualiser has been designed to show the spectrum which can be expected based on the value of different parameters. The basic operation of the tool is relatively simple. All that is required is the change the parameters of up to four sextets in the relevant fields and then press "Update Graph".

Γ = Linewidth (mm/s); δ = isomer shift; ΔEQ = quadrupole splitting; Bhf = hyperfine magnetic field

Oxidation state

⊕ Information
Mössbauer is very sensitive to oxidation state of iron, and so the technique is frequently used to distinguish between Fe(II) and Fe(III) redox states. The best way to see this is to compare the isomer shift (δ) and quadrupole splitting (ΔEQ) of doublets. Try changing these values in the boxes below. This approach is only reliable for doublets and not for sextets, so the hyperfine field parameter should be left at 0 T.

δ = isomer shift; ΔEQ = quadrupole splitting;

Abundance

⊕ Information
Integration under the area of Mössbauer spectra is used to provide the relative abundance of different mineral phases. This piechart indicates the relative contribution of each of the four available sites used here.
Site 1:
Site 2:
Site 3:
Site 4: