POLYAKOVITE-(Ce), (REE,Ca)4 (Mg,Fe2+) (Cr3+,Fe3+)2 (Ti,Nb)2 Si4 O22, A NEW METAMICT MINERAL SPECIES FROM THE ILMEN MOUNTAINS, SOUTHERN URALS, RUSSIA: MINERAL DESCRIPTION AND CRYSTAL CHEMISTRY

2001 ◽  
Vol 39 (4) ◽  
pp. 1095-1104 ◽  
Author(s):  
V. A. Popov ◽  
L. A. Pautov ◽  
E. Sokolova ◽  
F. C. Hawthorne ◽  
C. McCammon ◽  
...  
Keyword(s):  
Crystal Chemistry ◽  
Southern Urals ◽  
Mineral Species

Crystal chemistry and nomenclature of rhodonite-group minerals

2019 ◽  
Vol 83 (6) ◽  
pp. 829-835 ◽  
Author(s):  
Nadezhda V. Shchipalkina ◽  
Igor V. Pekov ◽  
Nikita V. Chukanov ◽  
Cristian Biagioni ◽  
Marco Pasero
Keyword(s):  
Crystal Chemistry ◽  
Structural Formula ◽  
Structure Type ◽  
Mineral Species ◽  
Triclinic Space Group ◽  
Space Group ◽  
International Mineralogical Association ◽  
Mineralogical Association ◽  
General Chemical

AbstractThis paper presents the nomenclature of the rhodonite group accepted by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (IMA). An overview of the previous studies of triclinic (space group P$\bar{1}$) pyroxenoids belonging to the rhodonite structure type, with a focus on their crystal chemistry, is given. These minerals have the general structural formula VIIM(5)VIM(1)VIM(2)VIM(3)VIM(4)[Si5O15]. The following dominant cations at the M sites are known at present: M(5) = Ca or Mn2+, M(1–3) = Mn2+; and M(4) = Mn2+ or Fe2+. In accordance with the nomenclature, the rhodonite group consists of three IMA-approved mineral species having the following the general chemical formulae: M(5)AM(1–3)B3M(4)C[Si5O15], where A = Ca or Mn2+; B = Mn2+; and C = Mn2+ or Fe2+. The end-member formulae of approved rhodonite-group minerals are as follows: rhodonite CaMn3Mn[Si5O15]; ferrorhodonite CaMn3Fe[Si5O15]; and vittinkiite MnMn3Mn[Si5O15].

Crystal chemistry of the polysome ferrohogbomite-2N2S, a long-known but newly defined mineral species

2002 ◽  
Vol 14 (5) ◽  
pp. 957-967 ◽  
Author(s):  
Clivia Hejny ◽  
Edwin Gnos ◽  
Bernard Grobety ◽  
Thomas Armbruster
Keyword(s):  
Crystal Chemistry ◽  
Mineral Species

A new mineral species ferricoronadite, Pb[Mn6 4+(Fe3+, Mn3+)2]O16: mineralogical characterization, crystal chemistry and physical properties

2016 ◽  
Vol 43 (7) ◽  
pp. 503-514 ◽  
Author(s):  
Nikita V. Chukanov ◽  
Sergey M. Aksenov ◽  
Simeon Jančev ◽  
Igor V. Pekov ◽  
Jörg Göttlicher ◽  
...  
Keyword(s):  
Physical Properties ◽  
Crystal Chemistry ◽  
Mineral Species ◽  
New Mineral ◽  
Mineralogical Characterization ◽  
New Mineral Species

A new mineral species rossovskyite, (Fe3+,Ta)(Nb,Ti)O4: crystal chemistry and physical properties

2015 ◽  
Vol 42 (10) ◽  
pp. 825-833 ◽  
Author(s):  
Sergey I. Konovalenko ◽  
Sergey A. Ananyev ◽  
Nikita V. Chukanov ◽  
Ramiza K. Rastsvetaeva ◽  
Sergey M. Aksenov ◽  
...  
Keyword(s):  
Physical Properties ◽  
Crystal Chemistry ◽  
Mineral Species ◽  
New Mineral ◽  
New Mineral Species

The crystal chemistry of the apatites

1968 ◽  
Vol 36 (281) ◽  
pp. 654-660 ◽  
Author(s):  
A. G. Cockbain
Keyword(s):  
General Formula ◽  
Crystal Chemistry ◽  
Mineral Species ◽  
Structural Basis ◽  
The Mean ◽  
Apatite Group

SummaryThe compositions of more than eighty synthetic members of the apatite group with the general formula A10(XO4)6Z2 have been used as a basis for classifying the apatites into three groups. The ratios of the mean sizes of the ‘A’ ions to those of the ‘X’ ions for all these compositions lie between the limits of 1·89 and 4·43. A discontinuity occurs between ratios of 2·50 and 2·60 and probably another between 3·25 and 3·35, and these discontinuities provide a structural basis for the division into the three groups. The groups are named after well-known mineral species occurring in each group, i.e. the vanadinite-svabites with an A : X ratio less than 2·5, the apatite-mimetites between 2·60 and 3·25, and the pyromorphites with A : X greater than 3·25.

The first data on possible Mezozoic magmatism within the Western slope of the Southern Urals

2018 ◽  
pp. 24-34
Author(s):  
A. O. Khotylev ◽  
N. B. Devisheva ◽  
Al. V. Tevelev ◽  
V. M. Moseichuk
Keyword(s):  
Southern Urals ◽  
Western Slope ◽  
Isotopic Age ◽  
The Southern Urals ◽  
Early Proterozoic ◽  
Carbonate Formations ◽  
Two Bodies

Within the Western slope of the Southern Urals, there are plenty of basite dyke complexes of Riphean to Vendian among Precambrian terrigenous-carbonate formations. In metamorphic formations of the Taratash complex (Archean to Early Proterozoic, the northern closure of the Bashkirian meganticlinorium) there was observed the andesitic dyke with isotopic age of 71±1 Ma (U-Pb SHRIMP II on zircons) and near Bakal two bodies of gabbroids with zircons of similar ages were found. These are the first evidence of possible Mezozoic magmatism in this region.

Crystal chemistry and stability relations in the system MgCO3–NiCO3*

1971 ◽  
Vol 133 (133) ◽  
pp. 432-444 ◽  
Author(s):  
Alan M. Gaines ◽  
Julian R. Goldsmith
Keyword(s):  
Crystal Chemistry
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