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Miguelromeroite

Posted by Armand Dutroux  
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Armand Dutroux
Miguelromeroite
August 09, 2009 08:00PM
Hello,friends!

A new mineral from RRUFF:

Name: Miguelromeroite
RRUFF ID: R070064
Ideal Chemistry: Mn5(AsO4)2(AsO3OH)2·4H2O
Locality: Veta Negra mine, Pampa Larga Mining District, Tierra Amarilla, Chile
Source: Bob Jenkins [view label]
Owner: RRUFF
Description: Sprays of pink thin prismatic crystals associated with siderite and cuproadamite
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.

WITH PHOTOS!

Thanks.
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Marco E. Ciriotti
Re: Miguelromeroite
August 09, 2009 08:32PM
It is IMA 2008-066.

Reference:
Kampf, A.R. (2009): Miguelromeroite, the Mn analogue of sainfeldite, and redefinition of villyaellenite as an ordered intermediate in the sainfeldite-miguelromeroite series. American Mineralogist, 94, (in press).



Edited 1 time(s). Last edit at 08/09/2009 08:40PM by Marco E. Ciriotti.
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Hans Kloster
Re: Miguelromeroite
August 12, 2009 06:46AM
´The IMA 2008-066 is in my register occupied by Villyaellenite?

Thanks for help.
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Marco E. Ciriotti
Re: Miguelromeroite
August 12, 2009 07:00AM
Villyaellenite is IMA 1983-008a.

See the title of the new paper:
Reference:
Kampf, A.R. (2009): Miguelromeroite, the Mn analogue of sainfeldite, and redefinition of villyaellenite as an ordered intermediate in the sainfeldite-miguelromeroite series. American Mineralogist, 94, (in press).
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Alfredo Petrov
Re: Miguelromeroite
August 18, 2009 02:46AM
Is this, in effect, a discreditation of villyaellenite?
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Stuart Mills
Re: Miguelromeroite
August 18, 2009 03:25AM 		ca    
No its ordered.
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Alfredo Petrov
Re: Miguelromeroite
August 18, 2009 03:54AM
But other minerals have both ordered and disordered varieties too - Do they qualify for species status?
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Stuart Mills
Re: Miguelromeroite
August 18, 2009 05:04AM 		ca    
In this case there are 3 sites where cations can substitute into.
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Knut Eldjarn
Re: Miguelromeroite
August 20, 2009 08:27PM 		no    
Does anybody know if ALL "Villyaellenite" from the Veta Negra mine is Miguelromeroite - or if the "ordered" intermediate keeping the Villyaellenite-name also occur there ?`Does it mean that all labels and pictures of "Villyaelenite" from this locality should be changed to Miguelromeroite ?

Knut
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Chester S. Lemanski, Jr.
Re: Miguelromeroite
August 21, 2009 12:57AM 		us    
My understanding is that all of the material from Chile and the Sterling Mine, New Jersey, USA, is the new mineral and that "Villyaellenite" is presently limited to Cap Garonne, France.
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Marco E. Ciriotti
Re: Miguelromeroite
August 21, 2009 02:07PM
Villyaellenite at the type locality of Saint-Marie-aux-Mines. (I am not aware about villyaellenite from Cap Garonne).
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Chester S. Lemanski, Jr.
Re: Miguelromeroite
August 21, 2009 03:41PM 		us    
My mistake! I meant Saint-Marie-aux-Mines!
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maurizio dini
Re: Miguelromeroite
August 21, 2009 04:52PM
Hello friends:

according to my information, (also pointed out in Knut's question), ALL THE FORMER VILLY'S from Veta Negra (chile) should now be considered MIGUELROMEROITE, so it's the NEW MINERAL descibed in Dr. Kampf-Stuart Mills et altri.
Smile you all, we have a new mineral in our collection!

A major restyling of the Veta Negra site should be done from Managment in the future!

Pd: I personally believe (but this is a personal matter, not Cience), that there are some solid solution at Veta Negra, and Villy is also there, but untill we don't proove it, .....

Maurizio Dini
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Uwe Kolitsch
Re: Miguelromeroite
August 25, 2009 09:58AM 		at    
Mineral page and photos updated.
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maurizio dini
Re: Miguelromeroite
August 25, 2009 01:53PM
Thanks Uwe:

always very quick and eficient !!!

maurizio dini
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Knut Eldjarn
Re: Miguelromeroite
August 26, 2009 05:25AM 		no    
What about the other localities for "villyaellenite" ? I have a specimen from Japan. Does anybody (Alfredo ?) know if this is still to be considered as Villyaellenite ?
Knut
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Jim Ferraiolo
Re: Miguelromeroite
August 26, 2009 05:03PM 		us    
The occurrence of villyaellenite at the Gozaisho mine is mentioned in at least two papers, the wallkilldellite [(Bulletin National Science Museum 27,45(2001)] and the romeite [Mineralogical Journal 18,45(2001)] articles. However, no analysis is given in either paper. It will have to stay villyaellenite until an analysis is published.
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Alfredo Petrov
Re: Miguelromeroite
August 26, 2009 05:11PM
Tony Kampf has apparently worked on the Gozaisho material, or knows someone who has, and says it is miguelromeroite plus a possible new, related phase, but not villyaellenite.
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Jim Ferraiolo
Re: Miguelromeroite
August 26, 2009 05:19PM 		us    
Thanks, Alfredo.
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Knut Eldjarn
Re: Miguelromeroite
August 26, 2009 06:39PM 		no    
Thanks to both of you. I will keep the "villyaellenite"-label with a? until further data is published.
Does anybody by the way know if Tony Kampf has studied the type material of villyaellenite to support the redefinition ?
Knut
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