Mindat Logo
bannerbannerbannerbanner
Welcome!

IMA 2010-006 = hermannroseite

Posted by Marco E. Ciriotti  
avatar IMA 2010-006 = hermannroseite
April 28, 2011 03:36AM
Reference:
▪ Schlüter, J., Pohl, D., Gebhard, G. (2011): The new mineral hermannroseite, CaCu(PO4,AsO4)(OH), the phosphate analogue of conichalcite, from Tsumeb, Namibia. Neues Jahrbuch für Mineralogie - Abhandlungen, 188, 135-140.

Abstract:
The new mineral hermannroseite (IMA-CNMNC No. 2010-006) has the chemical formula CaCu(PO4,AsO4)(OH). It is the phosphate analogue of conichalcite, CaCu(AsO4)(OH) and belongs to the adelite group where it represents the first phosphate end-member of this group. Hermannroseite is orthorhombic with space group P212121. X-ray powder diffraction studies gave a: 7.328(7), b: 9.123(7), c: 5.769(6) Å, V = 385.7(6) Å3, Z = 4. The strongest reflections in the X-ray powder diffraction data are as follows dobs. (Å) (I, hkl): 2.808 (100, 130), 2.571 (73, 112), 3.092 (63, 201), 5.710 (56, 110) and 4.057 (37, 111). Hermannroseite was found in the Tsumeb mine, Tsumeb, Namibia. With a mean grain size of 0.7 µm hermannroseite occurs within botryoidal aggegates and crusts of micro crystalline conichalcite in association with hydroxylapatite, whitlockite, pseudomalachite and amorphous manganese oxides/hydroxides.
Hermannroseite is translucent with a vitreous green colour. The calculated density is 4.08 g/cm3, the calculated mean refractive index is 1.77. Chemical analyses gave (wt.%): CaO 22.80, CuO 34.52, ZnO 0.58, P2O5 15.16, As2O5 21.88, V2O5 1.02, H2O(by difference) 4.04, sum 100.00 wt.%. The resulting empirical formula based on 5 anions is Ca0.96(Cu1.03Zn0.02)(P0.51As0.45V0.03) O3.94(OH)1.06.
Re: IMA 2010-006 = hermannroseite
April 28, 2011 04:02PM
    
I suspect the pure end-member will not be thermodynamically stable.
avatar Re: IMA 2010-006 = hermannroseite
March 09, 2012 11:17PM
    
Hey a mineral with my name yeah.

Herman
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 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands 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: October 25, 2014 22:49:24
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