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.
Classification of Ferri-winchite (of Leake 1978)
|Hey's CIM Ref.:||14.25.2|
14 : Silicates not Containing Aluminum
25 : Silicates of Fe, Ca and alkalis and of Fe, Mg, Ca and alkalis
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Optical Data of Ferri-winchite (of Leake 1978)
|RI values:||nα = 1.636 nβ = 1.646 nγ = 1.658|
|2V:||Measured: 82° , Calculated: 86°|
|Maximum Birefringence:||δ = 0.022|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Relationship of Ferri-winchite (of Leake 1978) to other Species
|Related Minerals - Hey's Index Grouping:|
Other Names for Ferri-winchite (of Leake 1978)
|Health Warning:||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)
Localities for Ferri-winchite (of Leake 1978)
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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