The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part V. Zilbermintsite-(La), (CaLa5)(Fe3+Al3Fe2+)[Si2O7][SiO4]5O(OH)3, a new mineral with ET2 type structure and a definition of the radekškodaite group

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F24%3A00137704" target="_blank" >RIV/00216224:14310/24:00137704 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.cambridge.org/core/journals/mineralogical-magazine/article/mineralogy-of-the-historical-mochalin-log-ree-deposit-south-urals-russia-part-v-zilbermintsitela-cala5fe3al3fe2si2o7sio45ooh3-a-new-mineral-with-et2-type-structure-and-a-definition-of" target="_blank" >https://www.cambridge.org/core/journals/mineralogical-magazine/article/mineralogy-of-the-historical-mochalin-log-ree-deposit-south-urals-russia-part-v-zilbermintsitela-cala5fe3al3fe2si2o7sio45ooh3-a-new-mineral-with-et2-type-structure-and-a-definition-of</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1180/mgm.2024.17" target="_blank" >10.1180/mgm.2024.17</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part V. Zilbermintsite-(La), (CaLa5)(Fe3+Al3Fe2+)[Si2O7][SiO4]5O(OH)3, a new mineral with ET2 type structure and a definition of the radekškodaite group

Popis výsledku v původním jazyce

The new mineral zilbermintsite-(La), ideally (CaLa5)(Fe3+Al3Fe2+)[Si2O7][SiO4](5)O(OH)(3), was found in a single polymineralic nodule from the Mochalin Log REE deposit, Chelyabinsk Oblast, South Urals, Russia. Zilbermintsite-(La) forms anhedral grains up to 0.65 x 0.20 mm at the contact of ferriperb &amp; oslash;eite-(La), t &amp; ouml;rnebohmite-(La) and ferriallanite-(Ce). Other associated minerals include bastn &amp; auml;site-(La), biraite-(La), ferriallanite-(La), ferriperb &amp; oslash;eite-(Ce), fluorbritholite-(Ce), monazite-(La), perb &amp; oslash;eite-(La), percleveite-(Ce), percleveite-(La), perrierite-(Ce), perrierite-(La), thorianite, thorite and quartz. The new mineral is light brown, translucent in thin fragments with a vitreous lustre. It is brittle, with good {100} cleavage. Mohs hardness is ca. 6. D-calc = 4.684 g cm(-3). Optically, zilbermintsite-(La) is biaxial (+), alpha = 1.805(7), beta = 1.812(7) and gamma = 1.867(8) (589 nm); 2V(meas) = 40(15)degrees and 2V(calc) = 40 degrees. The empirical formula based on O-28(OH,F)(3) apfu is (Ca0.94La2.56Ce2.18Nd0.20Pr0.10Th0.02)(Sigma 6.00)(Al2.96Fe0.903+Fe0.642+Mg0.34Mn0.13Ti0.03)(Sigma 5.00)Si7.00O28[(OH)(2.42)F-0.58]. Zilbermintsite-(La) is monoclinic, P2(1)/m; the unit-cell parameters are: a = 8.9605(5), b = 5.7295(2), c = 25.1033(13) &amp; Aring;, beta = 116.616(7), V = 1152.21(12) &amp; Aring;(3) and Z = 2. The crystal structure of zilbermintsite-(La) is solved from the single-crystal X-ray diffraction data [R = 0.0757 for 2857 unique reflections with I &gt; 2 sigma(I)]. The new mineral is isotypic to radek &amp; scaron;kodaite-(La) and radek &amp; scaron;kodaite-(Ce) and together with them forms the newly defined radek &amp; scaron;kodaite group. All members of this group possess the ET2 type structure where one epidote-type module (E) regularly alternates with two t &amp; ouml;rnebohmite-type modules (T). The new mineral honours Professor Veniamin A. Zilbermints (1887-1939) who was a pioneer of the study of the Mochalin Log deposit. The Levinson suffix-modifier -(La) indicates the predominance of La among rare-earth elements in the mineral.

Název v anglickém jazyce

The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part V. Zilbermintsite-(La), (CaLa5)(Fe3+Al3Fe2+)[Si2O7][SiO4]5O(OH)3, a new mineral with ET2 type structure and a definition of the radekškodaite group

Popis výsledku anglicky

The new mineral zilbermintsite-(La), ideally (CaLa5)(Fe3+Al3Fe2+)[Si2O7][SiO4](5)O(OH)(3), was found in a single polymineralic nodule from the Mochalin Log REE deposit, Chelyabinsk Oblast, South Urals, Russia. Zilbermintsite-(La) forms anhedral grains up to 0.65 x 0.20 mm at the contact of ferriperb &amp; oslash;eite-(La), t &amp; ouml;rnebohmite-(La) and ferriallanite-(Ce). Other associated minerals include bastn &amp; auml;site-(La), biraite-(La), ferriallanite-(La), ferriperb &amp; oslash;eite-(Ce), fluorbritholite-(Ce), monazite-(La), perb &amp; oslash;eite-(La), percleveite-(Ce), percleveite-(La), perrierite-(Ce), perrierite-(La), thorianite, thorite and quartz. The new mineral is light brown, translucent in thin fragments with a vitreous lustre. It is brittle, with good {100} cleavage. Mohs hardness is ca. 6. D-calc = 4.684 g cm(-3). Optically, zilbermintsite-(La) is biaxial (+), alpha = 1.805(7), beta = 1.812(7) and gamma = 1.867(8) (589 nm); 2V(meas) = 40(15)degrees and 2V(calc) = 40 degrees. The empirical formula based on O-28(OH,F)(3) apfu is (Ca0.94La2.56Ce2.18Nd0.20Pr0.10Th0.02)(Sigma 6.00)(Al2.96Fe0.903+Fe0.642+Mg0.34Mn0.13Ti0.03)(Sigma 5.00)Si7.00O28[(OH)(2.42)F-0.58]. Zilbermintsite-(La) is monoclinic, P2(1)/m; the unit-cell parameters are: a = 8.9605(5), b = 5.7295(2), c = 25.1033(13) &amp; Aring;, beta = 116.616(7), V = 1152.21(12) &amp; Aring;(3) and Z = 2. The crystal structure of zilbermintsite-(La) is solved from the single-crystal X-ray diffraction data [R = 0.0757 for 2857 unique reflections with I &gt; 2 sigma(I)]. The new mineral is isotypic to radek &amp; scaron;kodaite-(La) and radek &amp; scaron;kodaite-(Ce) and together with them forms the newly defined radek &amp; scaron;kodaite group. All members of this group possess the ET2 type structure where one epidote-type module (E) regularly alternates with two t &amp; ouml;rnebohmite-type modules (T). The new mineral honours Professor Veniamin A. Zilbermints (1887-1939) who was a pioneer of the study of the Mochalin Log deposit. The Levinson suffix-modifier -(La) indicates the predominance of La among rare-earth elements in the mineral.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Mineralogical Magazine

ISSN

0026-461X

e-ISSN

1471-8022

Svazek periodika

88

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

302-311

Kód UT WoS článku

001229960500001

EID výsledku v databázi Scopus

2-s2.0-85190111777