Winchite

Winchite is a mineral in the amphibole group.[2]

Winchite
General
CategoryMineral
IMA symbolWnc[1]
Crystal systemMonoclinic
Identification
Mohs scale hardness5½
LustreVitreous
StreakPale blue-grey

Winchite is named after Howard James Winch, its discoverer, in Madhya Pradesh, India. It's also known as Aluminowinchite or Eckrite. Similar in chemical composition to tremolite, Winchite additionally contains iron, potassium, sodium, and manganese. It typically occurs on grains of riebeckite and can be found in schist with metamorphosed manganese deposits. Globally, Winchite has been discovered in various locations including the southeastern part of Anglesey, the Kajlidongri mine in India, and Ward Creek in California.

Name

The mineral is named after Howard James Winch, who was the one discovered it in Madhya Pradesh, India.[3] Sir Lewis Fermor was the one who named the mineral.[4]

Winchite is also called Aluminowinchite or Eckrite.[3]

Chemistry

Winchite has a chemical composition similar to tremolite. But it contains iron, potassium, sodium, and manganese.[5]

Occurrence

Winchite occurs on grains of riebeckite.[6]: 137  It can be found in schist with metamorphosed manganese deposits.[7]

Distribution

It has been found on the south eastern part of Anglesey.[2] It has been found in Kajlidongri mine located in India as well at Ward creek in California.[7]

References
  1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. "Mineral Database - Mineralogy of Wales". National Museum Wales. Retrieved 2021-11-07.
  3. "Winchite". www.mindat.org. Retrieved 2021-11-07.
  4. "End Member". CiteSeerX 10.1.1.602.4009. {{cite journal}}: Cite journal requires |journal= (help)
  5. Mineralogical Magazine. Oxford University Press. 1907. p. 413.
  6. Ring, Uwe; London, Geological Society of; Brendan, M. T.; Lister, G.; Willett, Sean D. (1999). Exhumation Processes: Normal Faulting, Ductile Flow and Erosion. Geological Society of London. ISBN 978-1-86239-032-4.
  7. http://www.handbookofmineralogy.org/pdfs/winchite.pdf
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