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Crystal System:
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


Crystallography of UM1985-08-OH:FeHide

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

X-Ray Powder DiffractionHide

Powder Diffraction Data:
2.49 (s)
2.22 (m)
1.69 (m)
1.65 (w)
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.
  • 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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