Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Iowaite from the Udachnaya Kimberlite Pipe, Yakutia: Crystal Chemistry and Postcrystallization Transformations. / Zhitova, E. S.; Mikhailenko, D. S.; Pekov, I. V.; Korsakov, A. V.; Zolotarev, A. A.
в: Doklady Earth Sciences, Том 517, № 1, 01.07.2024, стр. 1190–1198.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Iowaite from the Udachnaya Kimberlite Pipe, Yakutia: Crystal Chemistry and Postcrystallization Transformations
AU - Zhitova, E. S.
AU - Mikhailenko, D. S.
AU - Pekov, I. V.
AU - Korsakov, A. V.
AU - Zolotarev, A. A.
PY - 2024/7/1
Y1 - 2024/7/1
N2 - Abstract: An atypical variety of iowaite with an extremely low content of divalent cations (Mg + Fe2+)/Fe3+ of ~2.75 : 1 is identified in a late hydrothermal mineral assemblage of the Udachnaya kimberlite pipe, Yakutia. Its crystal structure is studied using a single crystal: polytype 3R, space group, a = 3.1213(3) Å, с = 23.621(4) Å, V = 199.30(5) Å3; R1 = 0.027. Some crystals are characterized by zonation indicating a natural ion exchange, the leading schemes of which are 2Cl– → SO and 2Cl– → 2SO + Ca2+. This is the first reliable case of natural anion exchange in minerals of the hydrotalcite supergroup. The anion exchange reaction occurs with an increase of interlayer distance from 8.0 to 11.2 Å. The composition of the mineral and the character of its zonation bear information on the evolution of late hydrothermal processes.
AB - Abstract: An atypical variety of iowaite with an extremely low content of divalent cations (Mg + Fe2+)/Fe3+ of ~2.75 : 1 is identified in a late hydrothermal mineral assemblage of the Udachnaya kimberlite pipe, Yakutia. Its crystal structure is studied using a single crystal: polytype 3R, space group, a = 3.1213(3) Å, с = 23.621(4) Å, V = 199.30(5) Å3; R1 = 0.027. Some crystals are characterized by zonation indicating a natural ion exchange, the leading schemes of which are 2Cl– → SO and 2Cl– → 2SO + Ca2+. This is the first reliable case of natural anion exchange in minerals of the hydrotalcite supergroup. The anion exchange reaction occurs with an increase of interlayer distance from 8.0 to 11.2 Å. The composition of the mineral and the character of its zonation bear information on the evolution of late hydrothermal processes.
KW - Udachnaya kimberlite pipe
KW - crystal structure
KW - hydrotalcite group
KW - iowaite
KW - layered double hydroxide
UR - https://www.mendeley.com/catalogue/d4d5651b-42d7-3e9b-ae2e-80f24a868627/
U2 - 10.1134/s1028334x24601858
DO - 10.1134/s1028334x24601858
M3 - Article
VL - 517
SP - 1190
EP - 1198
JO - Doklady Earth Sciences
JF - Doklady Earth Sciences
SN - 1028-334X
IS - 1
ER -
ID: 120180643