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Ferri-winchite (of Leake 1978)



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,Fe
3+
 
)][(OH)
 
2
|Si
 
8
O
 
22
]
14.25.3Alumino-ferrowinchite
14.25.4Ferri-ferrowinchite
☐[CaNa][Fe
2+
4
(Fe
3+
 
,Al)][(OH)
 
2
|Si
 
8
O
 
22
]
14.25.5Ferrowinchite
☐[CaNa][Fe
2+
4
(Al,Fe
3+
 
)][(OH)
 
2
|Si
 
8
O
 
22
]
14.25.6Arfvedsonite
[Na][Na
 
2
][Fe
2+
4
Fe
3+
 
][(OH)
 
2
|Si
 
8
O
 
22
]
14.25.7Ferrorichterite
Na[CaNa][Fe
2+
5
][(OH)
 
2
|Si
 
8
O
 
22
]
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.

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    Localities for Ferri-winchite (of Leake 1978)

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    (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.
    Chile
     
    • Los Lagos Region
      • Osorno Province
    		CanMin 39:1547-1569 (2001)
    India
     
    • Madhya Pradesh
      • Jhabua District
    Russia
     
    • Urals Region
      • Southern Urals
        • Chelyabinsk Oblast'
          • Ilmen Mts
    		CanMin 39(1) 171-177
    Sweden
     
    • Värmland
      • Filipstad
        • Pajsberg
    		Kjell Gatedal
    Mineral and/or Locality
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