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Mineralogical ClassificationChukanovite

29th May 2007 17:23 UTCArmand Dutroux

Hello,friends!


It mineral are forgotten in the list of mindat minerals:


CHUKANOVITE- Dronino, Kasimov, Ryazan Oblast, Russia

This NEW SPECIES occurs in kamacite cavities as acicular to

fibrous masses forming brownish to greenish brown spherules of

radially fibrous aggregates, similar in morphology (but not

color) to malachite. This is author's studied material from the

relatively new Dronino ataxite meteorite that fell in prehistoric

times but was not discovered until 2000, subsequently described

in 2004. Formula: Fe2(CO3)(OH)2, the iron analog of malachite,

IMA #2005-039, named in honor of Russian physicist and

mineralogist Nikita Vladimirovich Chukanov (B. 1953). A very rare

species likely formed as an alteration product (under the bizarre

reducing conditions) of native iron with cold CO2-bearing

subsurface water. Only a few samples on hand, sizes from about

8mm to 1.9cm


FRom:Excalibur catalogue december,12-2005


Thanks.

29th May 2007 17:34 UTCMarco E. Ciriotti Manager

It's possible to find tha phase Fe2(CO3)(OH)2 under IMA 2005-039: http://www.mindat.org/show.php?id=28917


Type-description unpublished at today.
 
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