Melanosiderite
A variety of Ferrihydrite
This page is currently not sponsored. Click here to sponsor this page.
Formula:
Fe3+10O14(OH)2
Melanosiderite was described by Cooke (1875) as a hydrated basic ferric silicate. Examination of a specimen from the type locality and corresponding to the original description (BM66908), by energy-dispersive microanalysis, infrared spectroscopy, and X-ray diffraction, showed that melanosiderite is a siliceous variety of ferrihydrite (abstract from Am. Min. vol. 69 p. 412, 1984).
Cooke gives the locality as "Mineral Hill", but in S. G. Gordon, "Mineralogy of Pennsylvania" (1922), p. 190, the locality is given as "Smedley's Iron Mine", located close to Mineral Hill.
Cooke gives the locality as "Mineral Hill", but in S. G. Gordon, "Mineralogy of Pennsylvania" (1922), p. 190, the locality is given as "Smedley's Iron Mine", located close to Mineral Hill.
Unique Identifiers
Mindat ID:
41775 (as Melanosiderite)
1493 (as Ferrihydrite)
1493 (as Ferrihydrite)
Long-form identifier:
mindat:1:1:41775:6 (as Melanosiderite)
mindat:1:1:1493:5 (as Ferrihydrite)
mindat:1:1:1493:5 (as Ferrihydrite)
Chemistry of Melanosiderite
Mindat Formula:
Fe3+10O14(OH)2
Elements listed:
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Melanosiderite
mindat.org URL:
https://www.mindat.org/min-41775.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Mineral Dealers:
References for Melanosiderite
Localities for Melanosiderite
ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
- 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).
All localities listed without proper references should be considered as questionable.
USA | |
| Gordon (1922) |
