Winchite (of Fermor)
A synonym of Ferri-winchite
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Formula:
◻[CaNa][Mg4(Fe3+,Al)]Si8O22(OH)2
Synonym:
A synonym of Ferri-winchite
Winchite (of Fermor) was first described as a new amphibole by Fermor (1904), who also published the first chemical analysis in 1909. This analysis corresponds to a ferri-winchite composition: (K0.17(Na0.77Ca1.13)1.90(Mg4.55Mn2+0.09Fe3+0.73)5.37(Si7.70Al0.18)7.88O22(OH)2)
In 1906, Fermor described the mineral as follows: "This is the name which has been bestowed, after Mr. Howard J. Winch of Meghnagar, Central India, upon the blue amphibole from Kajlidongri, Jhabua State. ...An analysis of this mineral shows it to be closely allied to tremolite in chemical composition, but to contain in addition oxides of iron, soda, potash and manganese, to the last of which it probably owes its colouring"
The blue amphiboles described by Fermor and numerous authers in the 1950-ties and 1960-ties has prven to be mostly magnesio-arfvedsonite (Nayak and Leake (1975), Leake et al. (1981) and Leake et al. (1986).
Unique Identifiers
Mindat ID:
43464 (as Winchite (of Fermor))
27483 (as Ferri-winchite)
27483 (as Ferri-winchite)
Long-form identifier:
mindat:1:1:43464:7 (as Winchite (of Fermor))
mindat:1:1:27483:2 (as Ferri-winchite)
mindat:1:1:27483:2 (as Ferri-winchite)
GUID
(UUID V4):
(UUID V4):
091d75ae-470a-41a4-b382-78015d67b1b3 (as Winchite (of Fermor))
a0f03829-875e-4de5-a1bd-a91d1563aad1 (as Ferri-winchite)
a0f03829-875e-4de5-a1bd-a91d1563aad1 (as Ferri-winchite)
References for Winchite (of Fermor)
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Lewis Leigh Fermor (1904). A new form of blue amphibole from Central India. Records of the Geological Survey of lndia, 31, 235-236.
Lewis Leigh Fermor (1906). Manganese in India, Transactions of the Mining and Geological Institute of India, Vol 1, Part 2, 2nd edition
Lewis Leigh Fermor. (1909). The manganese ore deposits of India. Memoirs of the Geological Survey of India, 37, 1294 pp
Nayak, V. K. and Leake, B. E. (1975). On 'winchite' from the original locality at Kajlidongri, India, Mineralogical Magazine, 40,395-399.
Bernard E. Leake, Colin M Ferrow, V.K.Nayak: (1981). “Further studies on winchite from the type locality”, American Mineralogist, Volume 66, pages 625-631.
Leake B. E., Farrow C. M., Chao F., Nayak V. K. (1986). Winchite re-discovered from the type locality in India, Mineralogical Magazine, 50, 173-175.
Internet Links for Winchite (of Fermor)
mindat.org URL:
https://www.mindat.org/min-43464.html
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