TY - JOUR

T1 - Dimensional evolution in hydrated K+-bearing uranyl sulfates

T2 - From 2D-sheets to 3D-frameworks

AU - Kornyakov, Ilya V.

AU - Tyumentseva, Olga S.

AU - Krivovichev, Sergey V.

AU - Gurzhiy, Vladislav V.

PY - 2020/7/21

Y1 - 2020/7/21

N2 - In the course of the investigation of the phase formation in a K-bearing uranyl sulfate system under low-temperature hydrothermal conditions, stepwise crystallization of eight chemically and structurally distinct uranyl-bearing phases, including six novel compounds, has been observed. The crystal structures of four new compounds are based on units with novel topologies, one of which has never been observed in uranyl sulfates and three others are unprecedented for the structural chemistry of inorganic oxysalts. The obtained phases were analyzed using single-crystal XRD, EDX, topological analysis and information-based structural complexity calculations. The analysis of the chemical evolution in the system shows that the amount of U and S in the crystalline phases increases and decreases, respectively, driven by the increase of the pH value. The solution was heated to 55 °C, which appears to be insufficient for the formation of zippeite-type K-bearing uranyl sulfates. The analysis of the behavior of structural complexity indicates that most complex compounds crystallize on the borders between stability fields of stable compounds with less complex structural architectures.

AB - In the course of the investigation of the phase formation in a K-bearing uranyl sulfate system under low-temperature hydrothermal conditions, stepwise crystallization of eight chemically and structurally distinct uranyl-bearing phases, including six novel compounds, has been observed. The crystal structures of four new compounds are based on units with novel topologies, one of which has never been observed in uranyl sulfates and three others are unprecedented for the structural chemistry of inorganic oxysalts. The obtained phases were analyzed using single-crystal XRD, EDX, topological analysis and information-based structural complexity calculations. The analysis of the chemical evolution in the system shows that the amount of U and S in the crystalline phases increases and decreases, respectively, driven by the increase of the pH value. The solution was heated to 55 °C, which appears to be insufficient for the formation of zippeite-type K-bearing uranyl sulfates. The analysis of the behavior of structural complexity indicates that most complex compounds crystallize on the borders between stability fields of stable compounds with less complex structural architectures.

UR - http://www.scopus.com/inward/record.url?scp=85088249603&partnerID=8YFLogxK

U2 - 10.1039/d0ce00673d

DO - 10.1039/d0ce00673d

M3 - Article

AN - SCOPUS:85088249603

VL - 22

SP - 4621

EP - 4629

JO - CrystEngComm

JF - CrystEngComm

SN - 1466-8033

IS - 27

ER -