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Jahn-Teller effect

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Journal Article
Published: 01 August 2015
American Mineralogist (2015) 100 (8-9): 1752–1761.
...Atsushi Kyono; Stephen A. Gramsch; Yuki Nakamoto; Masafumi Sakata; Masato Kato; Tomoya Tamura; Takamitsu Yamanaka Abstract The Jahn-Teller effect at Cu 2+ in cuprospinel CuFe 2 O 4 was investigated using high-pressure single-crystal synchrotron X-ray diffraction techniques at beamline BL10A...
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Journal Article
Published: 01 October 1996
The Canadian Mineralogist (1996) 34 (5): 1089–1105.
... of volborthite and KCu (super 2+) 3 (OH) 2 [(ASO 4 )H(ASO 4 )], and a (2+2+2)-distorted Cu (super 2+) phi 6 octahedron in the structures of bayldonite and cyanochroite is attributed to a dynamic Jahn-Teller effect, rather than the static distortion that is usual in Cu (super 2+) phi 6 oxysalt structures...
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For Mn 3+  ( right ), the <span class="search-highlight">Jahn</span>–<span class="search-highlight">Teller</span> <span class="search-highlight">effect</span> causes elongation of the Mn–O ...
Published: 01 February 2021
Fig. 7. For Mn 3+ ( right ), the JahnTeller effect causes elongation of the Mn–O bond compared to Mn 4+ ( left ). Because of the loss of degeneracy, the orbitals for the Mn 3+ are offset to lower the energy of the partially filled orbitals. Reprinted with permission from Lucht and Mendoza
Journal Article
Published: 01 January 2009
American Mineralogist (2009) 94 (1): 74–82.
... of M 2+ on the structural environment surrounding K, M , and S sites. Results indicate that the distortion in the SO 4 tetrahedron and the M O 6 octahedron is very small, except for CuO 6 where it is pronounced because of the Jahn-Teller effect. The KO 8 -octacoordinate polyhedron has the highest...
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Journal Article
Published: 01 February 2016
American Mineralogist (2016) 101 (2): 362–370.
... for characterizing non-centrosymmetric distortions involving lone-pair and second-order Jahn-Teller effects. Here we show that the bond-valence sum and vectorial bond-valence sum are equivalent to monopole and dipole terms in a multipole expansion of the bond valence incident to an atom. We then extend the multipole...
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Journal Article
Published: 01 July 2005
European Journal of Mineralogy (2005) 17 (4): 581–586.
..., at this temperature of 0.35 ± 0.005 from the neutron diffraction experiments. Increasing temperature to 1000°C only causes a modest increase in x, to 0.40 ± 0.005. This somewhat unusual behaviour may be ascribed to local distortions from the Jahn-Teller effect in both octahedrally and tetrahedrally coordinated Cu 2...
FIGURES
Journal Article
Published: 01 July 2000
American Mineralogist (2000) 85 (7-8): 993–1000.
... of the axis of polyhedral elongation. The ordering scheme of these Jahn-Teller distorted octahedra follows in an alternating pattern the densest rod packing, and the cooperative effect of the electronically induced octahedral distortion was found to be responsible for the cubic-to-tetragonal symmetry breaking...
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Journal Article
Published: 01 February 2013
American Mineralogist (2013) 98 (2-3): 340–349.
... of the vector sum of the incident bond valences. It has been applied in the past to cations not subject to electronic structure effects (e.g., lone-pair or Jahn-Teller effects) in which case the expectation is that the vector sum will be approximately zero. Here we analyze 178 simple-oxide crystal structures...
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Journal Article