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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.

Classification of Ferri-winchite (of Leake 1978)

IMA status:Discredited
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)

Type:Biaxial (-)
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.
Surface Relief:Moderate
Dispersion:weak

Relationship of Ferri-winchite (of Leake 1978) to other Species

Related Minerals - Hey's Index Grouping:

- +
14.25.1Winchite
☐{CaNa}{Mg
 
4
Al}(Si
 
8
O
 
22
)(OH)
 
2
14.25.3Alumino-ferrowinchite
14.25.4Ferri-ferrowinchite
☐[CaNa][Fe
2+
4
(Fe
3+
 
,Al)]Si
 
8
O
 
22
(OH)
 
2
14.25.5Ferrowinchite
☐{CaNa}{Fe
2+
4
Al}(Si
 
8
O
 
22
)(OH)
 
2
14.25.6Arfvedsonite
[Na][Na
 
2
][Fe
2+
4
Fe
3+
 
]Si
 
8
O
 
22
(OH)
 
2
14.25.7Ferrorichterite
{Na}{CaNa}{Fe
2+
5
}(Si
 
8
O
 
22
)(OH)
 
2
14.25.8Imandrite
Na
 
12
Ca
 
3
Fe
3+
2
(Si
 
6
O
 
18
)
 
2
14.25.9Yakhontovite
(Ca,Na)
 
0.5
(Cu,Fe,Mg)
 
2
(Si
 
4
O
 
10
)(OH)
 
2
 · 3H
 
2
O

Other Names for Ferri-winchite (of Leake 1978)

Synonyms:
Ferrian Winchite
Other Languages:

Other Information

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)

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    • Localities for Ferri-winchite (of Leake 1978)

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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 10th Jul 2011 10:02:45
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