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Ferri-winchite (of Leake 1978)

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This name was rejected as a valid mineral, but new material has been analysed from the Ilmeny Mts in Russia and this has now been approved as a new mineral species Ferriwinchite. Localities listed below need to be re-examined, and may be better listed as localities for Ferrian Winchite.

Originally described from Kajlidongri mine, Jhabua District, Madhya Pradesh, India.

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Classification of Ferri-winchite (of Leake 1978)Hide


14 : Silicates not Containing Aluminum
25 : Silicates of Fe, Ca and alkalis and of Fe, Mg, Ca and alkalis

Optical Data of Ferri-winchite (of Leake 1978)Hide

Biaxial (-)
RI values:
nα = 1.636 nβ = 1.646 nγ = 1.658
Measured: 82° , Calculated: 86°
Max Birefringence:
δ = 0.022
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Synonyms of Ferri-winchite (of Leake 1978)Hide

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.25.1Winchite☐{CaNa}{Mg4Al}(Si8O22)(OH)2Mon. 2/m
14.25.3Alumino-ferrowinchite ☐{CaNa}{Fe2+4Al}(Si8O22)(OH)2
14.25.5Ferro-winchite ☐{CaNa}{Fe2+4Al}(Si8O22)(OH)2Mon.
14.25.6Arfvedsonite[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2Mon. 2/m : B2/m
14.25.9Yakhontovite(Ca,Na)0.5(Cu,Fe,Mg)2(Si4O10)(OH)2 · 3H2OMon.

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.

Internet Links for Ferri-winchite (of Leake 1978)Hide

Localities for Ferri-winchite (of Leake 1978)Hide

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.
  • Los Lagos
    • Osorno Province
Willner, A.P., Pawlig, S., Massonne, H-J., Hervé, F. (2001) Metamorphic evolution of spessartine quartzites (coticules) in the high-pressure, low-temperature complex at Bahia Mansa, coastal cordillera of south-central Chile. The Canadian Mineralogist, 39:6, 1547–1569. Doi: https://doi.org/10.2113/gscanmin.39.6.1547
  • Chelyabinsk Oblast
Canadian Mineralogist 39(1) 171-177
Mineral and/or Locality  
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