Mindat Logo
bannerbannerbannerbanner
Welcome!

Advanced

IMA 2008-063 = kolitschite

Posted by Stuart Mills  
avatar IMA 2008-063 = kolitschite
August 07, 2009 06:13PM
au    
Mills, S. J., Grey, I. E., Mumme, W. G., Miyawaki, R., Matsubara, S., Bordet, P., Birch, W. D. & Raudsepp, M. (2008) Kolitschite, Pb[Zn0.5,0.5]Fe3(AsO4)2(OH)6, a new mineral from Broken Hill, New South Wales, Australia, Australian Journal of Mineralogy, 14(2), 63–67.

Abstract

Kolitschite, ideally Pb[Zn0.5,□0.5]Fe3(AsO4)2(OH)6, where □ = vacancy, (IMA 2008–063), is a newly defined mineral from the Kintore opencut, Broken Hill, New South Wales, Australia. Kolitschite occurs as steeply pseudorhombohedral crystals to 0.2 mm associated with mimetite, segnitite, carminite, bayldonite and cryptomelane. The main forms observed are {110} (prism) and {001} (pinacoid). Kolitschite crystals are yellowish green with a light yellow streak and are transparent to translucent with an adamantine lustre. Mohs hardness is 4, no cleavage was observed and all crystals are twinned. Kolitschite is monoclinic, C2/c, with a = 25.8898(6), b = 14.8753(2), c = 12.1700(2) Å, β = 110.681(1)°, V = 4384.9(2) Å3 and Z = 16. Kolitschite crystals are biaxial (+), with estimated indices of refraction n = 2.0. 2V is ≤ 10°. Orientation: Y = b, with straight extinction and very weak pleochroism: X = green to olive green, Y = green to olive green, Z = yellowish green to apple green. Absorption: X ≈ Y > Z. The simplified formula (on the basis of [As+P+S] = 2 and OH- = 6) is: Pb[Zn0.25,□0.75]Fe3[(HAsO4)0.50(AsO4)1.50](OH)6, which requires Zn 2.12, Pb 26.86, Fe 21.72, As 19.42, O 29.03, H 0.85, total 100.00. A solid-solution series extends towards the end-member composition of Pb[Zn0.5,□0.5]Fe3H0.5(AsO4)2(OH)6, with the single-crystal structure giving a charge-balanced empirical formula of Pb[Zn0.439,□0.561]Fe3H0.061(AsO4)2(OH)6. The strongest five powder-diffraction lines [d in Å, (I/Io), (hkl)] are: 3.114, (100), (621, 62-3, 04-2); 6.034, (45), (400, 22-1); 2.280, (37), (404, 22-5); 3.719, (31), (62-1, 040); 2.844, (25), (004). Kolitschite is related to members of the alunite supergroup, in particular segnitite. The mineral is named for Dr Uwe Kolitsch (b. 1966), for his contribution to mineralogy.



Edited 2 time(s). Last edit at 08/17/2009 06:01PM by Stuart Mills.
avatar Re: IMA 2008-063 = kolitschite
August 07, 2009 06:13PM
au    
Congradulations Uwe! =)
Re: IMA 2008-063 = kolitschite
August 07, 2009 06:23PM
gb    
Another one up for the mindat management, congrat's Uwe
avatar Re: IMA 2008-063 = kolitschite
August 07, 2009 06:52PM
ca    
Congratulations Uwe!!!
avatar Re: IMA 2008-063 = kolitschite
August 07, 2009 06:56PM
us    
Congrats Uwe.
avatar Re: IMA 2008-063 = kolitschite
August 07, 2009 07:38PM
gb    
Congratulations Uwe, and very well deserved!
avatar Re: IMA 2008-063 = kolitschite
August 07, 2009 07:52PM
au    
Re: IMA 2008-063 = kolitschite
August 07, 2009 07:56PM
us    
Congratulations Uwe!
avatar Re: IMA 2008-063 = kolitschite
August 07, 2009 08:13PM
Congratulazioni Uwe!
Una dedica meritatissima!
Marco
avatar Re: IMA 2008-063 = kolitschite
August 07, 2009 09:27PM
nl    
What a good decision for a name, congratulations indeed Uwe!!
avatar Re: IMA 2008-063 = kolitschite
August 07, 2009 09:45PM
nl    
Congrats Uwe winking smiley
avatar Re: IMA 2008-063 = kolitschite
August 07, 2009 11:06PM
no    
Congratulations, Uwe. A very much deserved naming of a new mineral from a famous locality.
avatar Re: IMA 2008-063 = kolitschite
August 08, 2009 12:22AM
us    
The name has a nice ring to it, congratulations Uwe! :)
CorradoB
Re: IMA 2008-063 = kolitschite
August 08, 2009 12:10PM
My best congratulations Uwe !
Your competency, devotion and enthusiasm to mineralogy and your constant availability in helping us, amateur mineralogists, well motivate the acknowledgement.

Ciao

Corrado Balestra
Re: IMA 2008-063 = kolitschite
August 08, 2009 12:15PM
ca    
A more than well deserved honor. Congratulations Uwe.
Laszlo
avatar Re: IMA 2008-063 = kolitschite
August 08, 2009 04:48PM
be    
Hi all,

It was about time that a man with such a knowledge about minerals is immortisised with a mineral bearing his name.

From the bottom of my heart, Congratulations Uwe. You truly deserve it.

Take care and best regards.

Paul.
Re: IMA 2008-063 = kolitschite
August 08, 2009 08:43PM
Congratulations, Uwe ! About time you got one, and very well deserved ! Keep up the good work you do for the mineralogical community.

Roy
Re: IMA 2008-063 = kolitschite
August 08, 2009 08:50PM
it    
Congratulations Uwe!!!!!
avatar Re: IMA 2008-063 = kolitschite
August 08, 2009 10:28PM
us    
Yay, Uwe!
avatar Re: IMA 2008-063 = kolitschite
August 09, 2009 02:36AM
Well done and well deserved Uwe

Regards,
Ralph
Author:

Your Email:


Subject:


Attachments:
  • Valid attachments: jpg, gif, png, pdf
  • No file can be larger than 1000 KB
  • 3 more file(s) can be attached to this message

Spam prevention:
Please, enter the code that you see below in the input field. This is for blocking bots that try to post this form automatically. If the code is hard to read, then just try to guess it right. If you enter the wrong code, a new image is created and you get another chance to enter it right.
CAPTCHA
Message:

Mineral and/or Locality
Search Google
 
Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: 12th Feb 2012 07:13:52
Mineral and Locality Search
Mineral:
and/or Locality:
Options
Fade toolbar when not in focusFix toolbar to bottom of page
Hide Social Media Links
Slideshow frame delay seconds