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UM1985-08-OH:Fe

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Formula:
ɛ-FeOOH
Crystal System:
Monoclinic
Isostructural with:
Synthetic material (90 kB, 400oC) was first reported by Bendeliani et al. (1972). Later found in ferruginous black shale, more narrowly its soft, poorly laminated and very fine-grained variety. Associates include quartz and illite. The unnamed FeOOH occupies at least of 40% of the shale volume.


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Chemical Properties of UM1985-08-OH:FeHide

Formula:
ɛ-FeOOH

Crystallography of UM1985-08-OH:FeHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 8.721 Å, b = 5.164 Å, c = 5.680 Å
β = 90°
Ratio:
a:b:c = 1.689 : 1 : 1.1
Unit Cell V:
255.80 ų (Calculated from Unit Cell)
Comment:
synthetic material

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.34(
2.56(
2.49 (s)
2.22 (m)
1.76(
1.69 (m)
1.65 (w)
1.54(
Comments:
comparable to reflections of the synthetic phase (3.335, 2.56, 2.488, 2.22, 2.162, 1.750, 1.689, 1.655, 1.541, 1.50, 1.447, 1.369)

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for UM1985-08-OH:FeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bendeliani, N.A., Baneyeva, M.I., Poryvkin, D.S. (1972) Geochem. Int.: 9: 589-590
Ostwald, J. (1985): An Occurrence of ɛ-FeOOH in a Black Shale. Mineralogical Magazine: 49: 139-140
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se (2016)

Internet Links for UM1985-08-OH:FeHide

Localities for UM1985-08-OH:FeHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • Western Australia
    • Ashburton shire
Ostwald, J. (1985): An Occurrence of ɛ-FeOOH in a Black Shale. Mineralogical Magazine: 49: 139-140
Mineral and/or Locality  
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