21st line 2; 199026 St. Petersburg, Russia
Phone/Fax: +7 (812) 328-8640 email: rmo@minsoc.ru
founded in 1817
200th Anniversary Meeting of the Russian Mineralogical Society
Saint Petersburg, Russia
10-13 October 2017
2017minsoc.ru
http://www.minsoc.ru/2017/
Site map
Conferences & Meetings 200th Anniversary Meeting of the Russian Mineralogical Society
print print version
 

Locations of visitors to this page
News
MinSoc Info
Membership
Branches
Commissions
Awards
Conferences & Meetings
Zapiski RMO (Journal)
e-Library
EMU
IMA
Links
Guestbook
Help
re-registered: 931
yesterday: 158
week:
users: 2746
active: 2320
organizations: 750
departments: 435
useful links: 66
announced: 26
registration open: 1
total: 2007
PDF: 1986
issues: 547
articles: 9606
PDF of abstracts: 2156
fulltext articles: 3830
records: 43
fulltext PDF: 9
Presentations
| search |
Ammoniovoltaite a new mineral from Severo-Kambalny geothermal field, Southern Kamchatka, Russia

RMS-DPI code:  2017-1-245-0
Scientific session:  6. Mineral diversity and evolution of mineral formation processes.
Author listing:  Zhitova E.S., Siidra O.I., Nuzhdaev A.A., Ismagilova R.M., Belakovskiy D.I., Shilovskikh V.V.
Principal author:  Zhitova Elena Sergeevna
Language:  Russian
Abstract - Summary 
(short description):
Ammoniovoltaite, (NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18, is a new voltaite-group mineral. The mineral was discovered at Severo-Kambalny geothermal field, Kambalny volcanic ridge, Southern Kamchatka, Russia. Ammoniovoltaite forms at ~ 100C around geothermal gas-steam vents in association with alunogen, tschermigite and pyrite. Crystals of ammoniovoltaite have euhedral habit up to 50 m wide and grow on alunogen plates. Ammoniovoltaite is black with vitreous luster, opaque, brittle and water-soluble. Neither cleavage nor parting is found, the fracture is concoidal. The mineral is isotropic, the refractive index n =1.602(2) (589 nm). Infrared spectra contain absorption band at 1433 cm-1 distinctive for ammonium ion. The chemical composition is (iron content is given in accordance with Mössbauer data, H2O calculated by structure refinement, wt. %): FeO 13.26, Fe2O3 11.58, MgO 2.33, ZnO 0.04, Al2O3 2.74, SO3 47.46, K2O 0.19, CaO 0.11, (NH4)2O 2.96, H2O 16.66, total 97.33. The empirical formula based on S = 12 atoms per formula unit is [(NH4)1.88K0.08Ca0.04]Σ2.00(Fe2+3.74Mg1.17Fe3+0.05Zn0.01)Σ4.97(Fe3+2.89Al0.09)Σ2.98Al1.00(SO4)12.00(H2O)18.72. The crystal structure has been refined to R1 = 0.0361 on the basis of 1217 unique reflections with I >2σ(I). Ammoniovoltaite is cubic, Fd-3c, a = 27.250(1) Å, V = 20234(2) Å3, Z = 16. The strongest lines of the powder X-ray diffraction pattern [d, Å (I, %) (hkl)] are: 9.67 (74) (022), 7.90 (56) (222), 5.58 (84) (224), 3.560 (100) (137), 3.418 (100) (008), 2.8660 (37) (139). A brief review of ammonium minerals from various volcanically active geological environments is given.

Keywords: ammoniovoltaite; sulphate; ammonium; new mineral; voltaite group; geothermal field; Kambalny volcano
 
RMS-DPI code:  2017-1-245-0
Pages:  216-217
File of proceedings 
(PDF): 
 120 K
Status:  printed
Recieved:  27/08/2017
Accepted:  16/09/2017
Published on-line:  07/12/2017
Permanent address of publication:  http://www.minsoc.ru/2017-1-245-0/
Contact author(s):  Zhitova, Elena Sergeevna
 

Error. Page cannot be displayed. Please contact your service provider for more details. (21)



site administrator: adminminsoc.ru (Docent Morozov, Mikhail)
registration | forgot password?
 
about registration
RMS distribution list service
Subscribe
NEW !!! RMS 200th Anniversary Meeting 2017
RMS for You:  PDF (37k)
RMS Directory
List of organizations

"Zapiski RMO" online
New Books

e-Prints:
RMS Annual Session and Fedorov Session 2012
General Meeting and Fedorov Session 2010
Minerals as Advanced Materials II
Annual Session 2009
Annual Session 2008
Fedorov Session 2008
TBG-XIII & APIFIS-IV
Crystallogenesis&Mineralogy'07
Annual Session 2007
Annual Session 2006
Fedorov Session 2006

Competitions:
2009
2008
2007
ßíäåêñ.Ìåòðèêà
turk porno
ankara escort
tuzla escort
liseli porno
huluhub.com
seks filmi izle