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electronic spin transitions

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Journal Article

High-pressure phase transitions of Fe 3–x Ti x O 4 solid solution up to 60 GPa correlated with electronic spin transition

Takamitsu Yamanaka, Atsushi Kyono, Yuki Nakamoto, Yue Meng, Svetlana Kharlamova, Victor V. Struzhkin, Ho-kwang Mao
Published: 01 April 2013
American Mineralogist (2013) 98 (4): 736–744.
DOI: https://doi.org/10.2138/am.2013.4182
... decomposition. High-pressure studies of spinels are also motivated by the need to understand strong electronic correlations such as charge transfer, electron hopping, electron high-low spin transition, Jahn-Teller distortion, and charge disproponation in the lower mantle or subduction zone. The solid...
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Melting temperature depression due to the electronic spin transition of iron

Jie Deng, Kanani K.M. Lee
Published: 01 August 2019
American Mineralogist (2019) 104 (8): 1189–1196.
DOI: https://doi.org/10.2138/am-2019-6948
...Jie Deng; Kanani K.M. Lee Abstract The electronic spin transition of iron has been shown to strongly affect many thermoelastic properties of the host mineral. However, the response of melting temperatures to the spin transition remains largely unexplored. Here, we study the melting of lower mantle...
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Vibrational and elastic properties of ferromagnesite across the electronic spin-pairing transition of iron

Jung-Fu Lin, Jin Liu, Caleb Jacobs, Vitali B. Prakapenka
Published: 01 April 2012
American Mineralogist (2012) 97 (4): 583–591.
DOI: https://doi.org/10.2138/am.2012.3961
... storage in the planet’s interior and on its surface. Here we have studied high-pressure vibrational and elastic properties of magnesian siderite [(Mg 0.35 Fe 0.65 )CO 3 ] across the electronic spin transition by Raman and X-ray diffraction spectroscopies in a diamond-anvil cell. Our results show...
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High-pressure behavior of the polymorphs of FeOOH

Mary M. Reagan, Arianna E. Gleason, Luke Daemen, Yuming Xiao, Wendy L. Mao
Published: 01 June 2016
American Mineralogist (2016) 101 (6): 1483–1488.
DOI: https://doi.org/10.2138/am-2016-5449
... by XES as a function of pressure up to 85 GPa and observed an electronic spin transition that began at approximately 50 GPa, which is consistent with previous results. In the γ-FeOOH sample, we see the initiation of a spin transition at 35 GPa that remains incomplete up to 65 GPa. β-FeOOH does not show...
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Spin transition of Fe 2+ in ringwoodite (Mg,Fe) 2 SiO 4 at high pressures

Igor S. Lyubutin, Jung-Fu Lin, Alexander G. Gavriliuk, Anna A. Mironovich, Anna G. Ivanova, Vladimir V. Roddatis, Alexander L. Vasiliev
Published: 01 October 2013
American Mineralogist (2013) 98 (10): 1803–1810.
DOI: https://doi.org/10.2138/am.2013.4400
...Igor S. Lyubutin; Jung-Fu Lin; Alexander G. Gavriliuk; Anna A. Mironovich; Anna G. Ivanova; Vladimir V. Roddatis; Alexander L. Vasiliev Abstract Electronic spin transitions of iron in the Earth’s mantle minerals are of great interest to deep-Earth researchers because their effects on the physical...
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Absence of pressure-induced electron spin-state transition of iron in silicate glasses upon compression

Sung Keun Lee
Published: 01 May 2014
American Mineralogist (2014) 99 (5-6): 877–878.
DOI: https://doi.org/10.2138/am.2014.4864
... – 597 . Lin J.F. Speziale S. Mao Z. Marquardt H. ( 2013 ) Effects of the electronic spin transitions of iron in lower-mantle minerals: implications to deep-mantle geophysics and geochemistry . Review in Geophysics , 51 , 244 – 275 . Mao Z. Lin J.F. Scott H.P...
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Bonding and structural changes in siderite at high pressure

Gabriela Farfan, Shibing Wang, Hongwei Ma, Razvan Caracas, Wendy L. Mao
Published: 01 August 2012
American Mineralogist (2012) 97 (8-9): 1421–1426.
DOI: https://doi.org/10.2138/am.2012.4001
... as a result of a combination of rotation and volume shrinkage of the FeO 6 octahedra while siderite undergoes the isostructural volume collapse and electronic spin transition. * E-mail: [email protected] Manuscript handled by Jennifer Kung † Present address: Department of Geological...
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Electron spin resonance in natural kaolinites containing Fe (super 3+) and other transition metal ions

R. E. Meads, P. J. Malden
Journal: Clay Minerals
Published: 01 July 1975
Clay Minerals (1975) 10 (5): 313–345.
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A spin on lower mantle mineralogy

Jeffrey S. Pigott
Published: 01 January 2016
American Mineralogist (2016) 101 (1): 1–2.
DOI: https://doi.org/10.2138/am-2016-5497
... is the most abundant transition metal in Earth’s crust and mantle and exists in either the Fe 2+ (ferrous) or Fe 3+ (ferric) oxidation state. At the surface of the Earth, Fe 2+ and Fe 3+ are in the high-spin electronic state where the partially filled 3 d subshell is dominated by orbitals with unpaired...
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Synchrotron Mössbauer spectroscopic study of ferropericlase at high pressures and temperatures

Jung-Fu Lin, Alexander. G. Gavriliuk, Wolfgang Sturhahn, Steven D. Jacobsen, Jiyong Zhao, Michael Lerche, Michael Hu
Published: 01 April 2009
American Mineralogist (2009) 94 (4): 594–599.
DOI: https://doi.org/10.2138/am.2009.3108
...Jung-Fu Lin; Alexander. G. Gavriliuk; Wolfgang Sturhahn; Steven D. Jacobsen; Jiyong Zhao; Michael Lerche; Michael Hu Abstract The electronic spin state of Fe 2+ in ferropericlase, (Mg 0.75 Fe 0.25 )O, transitions from a high-spin (spin unpaired) to low-spin (spin paired) state within the Earth’s...
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New structure of high-pressure body-centered orthorhombic Fe 2 SiO 4

Takamitsu Yamanaka, Atsushi Kyono, Yuki Nakamoto, Svetlana Kharlamova, Viktor V. Struzhkin, Stephen A. Gramsch, Ho-kwang Mao, Russell J. Hemley
Published: 01 August 2015
American Mineralogist (2015) 100 (8-9): 1736–1743.
DOI: https://doi.org/10.2138/am-2015-4744
... dispersion curves from density functional theory at pressures up to 20 GPa (Jing and Guo 2004; Derzsi et al. 2011 ). Electronic spin transitions attributed to change from the high-spin (HS) to low-spin (LS) states in transition metals, particularly iron, have been increasingly used to understand...
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Resonant X-ray emission study of the lower-mantle ferropericlase at high pressures

Jung-Fu Lin, Zhu Mao, Ignace Jarrige, Yuming Xiao, Paul Chow, Takuo Okuchi, Nozomu Hiraoka, Steven D. Jacobsen
Published: 01 August 2010
American Mineralogist (2010) 95 (8-9): 1125–1131.
DOI: https://doi.org/10.2138/am.2010.3495
[email protected] 21 04 2010 09 01 2010 © 2010 American Mineralogist 2010 Ferropericlase diamond anvil cell spin transition resonant X-ray emission spectroscopy partial fluorescence yield high pressures Electronic states of iron, including total spin momentum and valence charge...
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Effects of composition and pressure on electronic states of iron in bridgmanite

Susannah M. Dorfman, Vasily Potapkin, Mingda Lv, Eran Greenberg, Ilya Kupenko, Aleksandr I. Chumakov, Wenli Bi, E. Ercan Alp, Jiachao Liu, Arnaud Magrez, Siân E. Dutton, Robert J. Cava, Catherine A. McCammon, Philippe Gillet
Published: 01 July 2020
American Mineralogist (2020) 105 (7): 1030–1039.
DOI: https://doi.org/10.2138/am-2020-7309
... in the diamond-anvil cell at pressures up to 76 GPa below and above the high to low spin transition in Fe 3+ provide a Mössbauer reference library for bridgmanite and demonstrate the effects of pressure and composition on electronic states of iron. Results indicate that although the spin transition in Fe 3...
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The iron spin transition of deep nitrogen-bearing mineral Fe 3 N 1.2 at high pressure

Chaojia Lv, Jin Liu
Published: 03 April 2023
American Mineralogist (2023) 108 (4): 653–658.
DOI: https://doi.org/10.2138/am-2022-8434
.... The iron 3 d orbitals collapse under extremely high pressures of the deep Earth, leading to the high-spin to low-spin transition of iron-bearing minerals. The configuration and interaction of the outermost shell electrons of iron, which are dramatically altered by pressure, are essentially significant...
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Optical properties of siderite (FeCO 3 ) across the spin transition: Crossover to iron-rich carbonates in the lower mantle

Sergey S. Lobanov, Alexander F. Goncharov, Konstantin D. Litasov
Published: 01 May 2015
American Mineralogist (2015) 100 (5-6): 1059–1064.
DOI: https://doi.org/10.2138/am-2015-5053
... → 5 E g and 1 A 1g → 1 T 1g electronic transitions in high- and low-spin siderite, respectively. Similarly, we evaluate the crystal field splitting energy of low-spin siderite 10Dq = 17 600 cm −1 (45 GPa), as well as the Racah parameters B = 747 cm −1 and C = 3080 cm −1 . We find that the crystal...
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Electronic spin states of ferric and ferrous iron in the lower-mantle silicate perovskite

Jung-Fu Lin, Ercan E. Alp, Zhu Mao, Toru Inoue, Catherine McCammon, Yuming Xiao, Paul Chow, Jiyong Zhao
Published: 01 April 2012
American Mineralogist (2012) 97 (4): 592–597.
DOI: https://doi.org/10.2138/am.2012.4000
.... Fiquet G. Guyot F. ( 2004 ) Electronic transitions in perovskite: possible nonconvecting layers in the lower mantle . Science , 305 , 383 – 386 . Bengtson A. Persson K. Morgan D. ( 2008 ) Ab initio study of the composition dependence of the pressure-induced spin crossover...
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Simplified Jabłoński energy diagram showing singlet (S) and triplet (T) ele...

Simplified Jabłoński energy diagram showing singlet (S) and triplet (T) ele...

Published: 01 October 2024
Figure 4. Simplified Jabłoński energy diagram showing singlet (S) and triplet (T) electronic states along with their vibronic levels (0–3). Non-radiative energetic transitions are visualised by black arrows (dotted, vibrational relaxation; dashed, internal conversion), and the electron’s spin
Journal Article

An UV/Vis/NIR optical absorption spectroscopic and color investigation of transition-metal-doped gahnite (ZnAl 2 O 4 spinel) crystals grown by the flux method

Michail N. Taran, Oleksii A. Vyshnevskyi, Charles A. Geiger
Published: 02 January 2024
American Mineralogist (2024) 109 (1): 157–166.
DOI: https://doi.org/10.2138/am-2022-8708
.... 2010 ; Verger et al. 2016 ). Their predominant absorption features are two broad and intense bands with maxima at about 18 430 and 25 870 cm –1 . They were assigned to the spin-allowed 4 A 2g → 4 T 2g ( 4 F) and 4 A 2g → 4 T 1g ( 4 F) electronic transitions, respectively. Another absorption...
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UV/Vis single-crystal spectroscopic investigation of almandine-pyrope and almandinespessartine solid solutions: Part I. Spin-forbidden Fe 2+,3+ and Mn 2+ electronic-transition energies, crystal chemistry, and bonding behavior

Charles A. Geiger, Michail N. Taran, George R. Rossman
Published: 01 June 2023
American Mineralogist (2023) 108 (6): 1149–1160.
DOI: https://doi.org/10.2138/am-2022-8499
... )O 12 , crystals were measured by UV/Vis/NIR (~29 000 to 10 000 cm –1 ) optical absorption spectroscopy using a microscope. The spectra and changes in energy of several Fe 2+ and Mn 2+ spin-forbidden electronic transitions of different wavenumber were analyzed as a function of garnet composition...
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Electronic transitions of iron in almandine-composition glass to 91 GPa

Susannah M. Dorfman, Sian E. Dutton, Vasily Potapkin, Aleksandr I. Chumakov, Jean-Pascal Rueff, Paul Chow, Yuming Xiao, Robert J. Cava, Thomas S. Duffy, Catherine A. McCammon, Philippe Gillet
Published: 01 July 2016
American Mineralogist (2016) 101 (7): 1659–1667.
DOI: https://doi.org/10.2138/am-2016-5606
... with low-spin Fe 3+ . These observations suggest that Fe 3+ in the glass undergoes a continual transition from a high-spin to a low-spin state between 1 bar and ~30 GPa. Almandine glass is not expected to undergo any abrupt transitions in electronic state at deep mantle pressures. * E-mail: dorfman3...
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