NEW MINERAL DISCOVERY 101 : Kernowite

 

Kernowite: Mineral information, data and localities. (mindat.org)

Kernowite Formula: Cu2Fe(AsO4)(OH)4 • 4H2O 

Colour: Emerald-green 

Crystal System: Monoclinic

Name:

For Kernow, the Cornish language name for Cornwall.

This is the third mineral to be named after Cornwall - following cornwallite and cornubite, which are both also copper arsenates.

Type Locality:

ⓘ Wheal Gorland, St Day, Cornwall, England, UK

The Fe³⁺- analogue of liroconite. Found on an old museum specimen.

Kernowite is a complex arsenate mineral. This is a new mineral that has been discovered by scientists analysing a rock mined in Cornwall about 220 years ago. The name of the mineral comes from the word Kernow, the Cornish language word for Cornwall. A group led by Natural History Museum (NHM) mineralogist Mike Rumsey made the discovery while studying a rock taken from Wheal Gorland mine in St Day. For centuries, mineralogists believed the green crystals to be a variation of another mineral, liroconite, but Dr.Rumsey and his team found it has a different chemical composition

Source -

https://www.cambridge.org/core/journals/mineralogical-magazine/article/kernowite-cu2feaso4oh44h2othe-fe3analogue-of-liroconite-from-cornwall-uk/