Incommensurate structures of the [CH3NH3][Co(COOH)3] compound

Cañadillas‐Delgado, Laura; Mazzuca, Lidia; Fabelo, Óscar; Rodríguez-Velamazán, J. A.; Rodriguez-Carvajal, J.

doi:10.1107/s2052252518015026

Cited by 16 publications

(17 citation statements)

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“…No such distortions have yet been observed in a formate or dicyanometallate perovskite, although [CH 3 NH 3 ]CoĲHCOO) 3 displays an incommensurate phase with modulation wavevector q = 0.1430 (2). 54 Overall, modes with "complex periodicities"-propagation vectors with other values than ½ or 0-appear to be more prevalent in molecular perovskites than in the oxide counterparts.…”

Section: Resultsmentioning

confidence: 99%

Tilts and shifts in molecular perovskites

Boström

2020

CrystEngComm

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Section: Resultsmentioning

confidence: 99%

Tilts and shifts in molecular perovskites

Boström

2020

CrystEngComm

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“…The title compound develops long-range magnetic order below 34 K . Moreover, the structural incommensurability shown by a Co-based isomorphous compound suggests that the reported Ni-based compound can present the coexistence of proper magnetic and structural incommensurability.…”

Section: Introductionmentioning

confidence: 93%

Experimental Evidence of the Coexistence of Proper Magnetic and Structural Incommensurability on the [CH₃NH₃][Ni(COOH)₃] Compound

et al. 2020

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The present work is dedicated to characterization of the structural phase transition and incommensurate magnetic structure of the [CH3NH3][Ni(COOH)3] (1) perovskite-like metal–organic compound. The structural and magnetic characterization has been performed through variable-temperature single-crystal and powder neutron diffraction. Compound 1 crystallizes in the orthorhombic Pnma space group at room temperature. Below 84 K, a new phase has been observed. The occurrence of new reflections, which can be indexed with a wavevector along the c axis [q = 0.1426(2)c*], suggests the occurrence of an incommensurately modulated crystal structure. The structure was determined using the superspace group formalism on the Pnma(00γ)0s0 space group. This incommensurate phase remains unchanged with a decrease of the temperature up to the base temperature (ca. 2 K). Moreover, the magnetic susceptibility data, collected under zero-field-cooled and field-cooled conditions at different applied magnetic fields, show that compound 1 exhibits antiferromagnetic behavior below 34 K. In the current paper, we have confirmed that compound 1 presents the coexistence of nuclear and proper magnetic incommensurability below T N.

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“…Despite the Cambridge Structural Database containing over 90 000 published MOF structures, 8,9 reports of coordination polymers and MOFs with aperiodicity are in the single digits. [10][11][12][13][14] This is particularly notable as the types of crystal-packing forces commonly found within MOFs are similar to those that typically lead to many aperiodic systems: weak interactions such as hydrogen bonding, dipole-dipole interactions, and p-stacking. 15 As an emerging eld of research, there are still many unknowns, but aperiodic MOFs are potentially of broad interest due to their phonon, electric, molecular transport, and photonic properties that likely diverge from those found with periodic MOFs.…”

Section: Introductionmentioning

confidence: 94%