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tetragonal almandine pyrope phase

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Journal Article

Tetragonal Almandine-Pyrope Phase, TAPP: finally a name for it, the new mineral jeffbenite

Fabrizio Nestola, Antony D. Burnham, Luca Peruzzo, Leonardo Tauro, Matteo Alvaro, Michael J. Walter, Mickey Gunter, Chiara Anzolini, Simon C. Kohn
Published: 01 December 2016
Mineralogical Magazine (2016) 80 (7): 1219–1232.
DOI: https://doi.org/10.1180/minmag.2016.080.059
...Fabrizio Nestola; Antony D. Burnham; Luca Peruzzo; Leonardo Tauro; Matteo Alvaro; Michael J. Walter; Mickey Gunter; Chiara Anzolini; Simon C. Kohn Abstract Jeffbenite, ideally Mg 3 Al 2 Si 3 O 8 , previously known as tetragonal-almandine-pyrope-phase (‘TAPP’), has been characterized as a new...
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Tetragonal almandine pyrope phase (TAPP): retrograde Mg-perovskite from subducted oceanic crust?

Lora S. Armstrong, Michael J. Walter
Published: 01 August 2012
European Journal of Mineralogy (2012) 24 (4): 587–597.
DOI: https://doi.org/10.1127/0935-1221/2012/0024-2211
...Lora S. Armstrong; Michael J. Walter Abstract Laser heated diamond-anvil-cell experiments performed on a “tetragonal almandine pyrope phase” (TAPP) bulk composition constrain high-temperature phase relations between 6 and 48 GPa. Phase assemblages determined by synchrotron X-ray diffraction consist...
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The crystal structure of “Tetragonal Almandine-Pyrope Phase” (TAPP): A reexamination

Larry W. Finger, Pamela G. Conrad
Published: 01 November 2000
American Mineralogist (2000) 85 (11-12): 1804–1807.
DOI: https://doi.org/10.2138/am-2000-11-1224
...Larry W. Finger; Pamela G. Conrad Abstract X-ray intensities for the “tetragonal almandine-pyrope phase” (TAPP), *(FeMg) VIII (AlMgFe) 4 [IV (SiAl)O 4 ] 3 where * refers to a capped tetrahedral site, reported by Harris et al. (1997) were recollected using the identical crystal, and the crystal...
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Diamond formation in the deep mantle: the record of mineral inclusions and their distribution in relation to mantle dehydration zones

B. Harte
Published: 01 April 2010
Mineralogical Magazine (2010) 74 (2): 189–215.
DOI: https://doi.org/10.1180/minmag.2010.074.2.189
... of these natural assemblages, the tetragonal almandine pyrope phase occurs rather than the garnet found in experiments. As natural diamonds are believed to crystallize in fluids/melts, the hypothesis is developed that the restriction of diamonds and inclusions of particular compositions to the above two depth...
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150 micron-long green <span class="search-highlight">tetragonal</span>-structured garnet known as TAPP (tetragona...

150 micron-long green tetragonal-structured garnet known as TAPP (tetragona...

Published: 01 March 2005
FIGURE 5 150 micron-long green tetragonal-structured garnet known as TAPP (tetragonal almandine-pyrope phase), in a diamond from the São Luiz alluvial deposits, Brazil. P hoto by J effrey W. H arris
Journal Article

Ferromagnesian jeffbenite synthesized at 15 GPa and 1200 °C

Joseph R. Smyth, Fei Wang, E. Ercan Alp, Aaron S. Bell, Esther S. Posner, Steven D. Jacobsen
Published: 01 March 2022
American Mineralogist (2022) 107 (3): 405–412.
DOI: https://doi.org/10.2138/am-2021-7852
...+ /ΣFe. b 1σ standard deviation given in parentheses. Copyright © 2022 by the Mineralogical Society of America 2022 Mineralogical Society of America Jeffbenite tetragonal almandine pyrope phase (TAPP) super deep diamonds diamond inclusions Jeffbenite is a new mineral recently...
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High-pressure elasticity of sodium majorite garnet, Na 2 MgSi 5 O 12

Mainak Mookherjee
Published: 01 November 2014
American Mineralogist (2014) 99 (11-12): 2416–2423.
DOI: https://doi.org/10.2138/am-2014-4956
... compared to a wide variety of garnets such as pyrope, grossular, almandine, and majorite garnet. Although single-crystal anisotropy of Na-majorite is greater than pyrope, it is still low compared to the major mantle phases. In this study we examine Na-majorite garnet with Na 2 MgSi 5 O 12...
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Diamonds, the mantle petrologist’s best friends

Fabrizio Nestola, Paolo Nimis, Ross J. Angel
Published: 01 August 2012
European Journal of Mineralogy (2012) 24 (4): 561–562.
DOI: https://doi.org/10.1127/0935-1221/2012/0024-2225
... and evolution in transition zone and upper mantle of the tetragonal almandine pyrope phase (TAPP), one of the minerals included in super-deep diamonds. Determining the pressure–temperature–time history of diamonds is extremely difficult, but Princivalle and co-authors discuss the kinetics of cation distribution...
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Photoatlas of Inclusions in Gemstones, volume 3.: By Eduard J. Gübelin and John I. Koivula. Opinio Publishers, Basel, Switzerland. Hardbound, 672 p. €250.00 or $300.00 (US) plus shipping (and tax, if applicable). ISBN 978–3–03999–047–4.

Quintin Wight
Published: 01 February 2009
The Canadian Mineralogist (2009) 47 (1): 212–213.
... to simply as TAPP (Tetragonal Almandine–Pyrope Phase), appeared first in an article in Nature in 1997 (Vol. 387, No. 6632, pp. 486–488). The majority of the illustrations on diamond, however, are the standard olivine, diopside, chromite, garnet type, or of cracks, feathers, and clouds. The authors also...
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Depth of diamond formation obtained from single periclase inclusions

Chiara Anzolini, Fabrizio Nestola, Mattia L. Mazzucchelli, Matteo Alvaro, Paolo Nimis, Andrea Gianese, Simone Morganti, Federica Marone, Marcello Campione, Mark T. Hutchison, Jeffrey W. Harris
Journal: Geology
Published: 18 January 2019
Geology (2019) 47 (3): 219–222.
DOI: https://doi.org/10.1130/G45605.1
... , v. 103 , p. 69 – 74 , https://doi.org/10.2138/am-2018-6184 . Armstrong , L.S. , and Walter , M.J. , 2012 , Tetragonal almandine pyrope phase (TAPP): Retrograde Mg-perovskite from subducted oceanic crust? : European Journal of Mineralogy , v. 24 , p. 587 – 597 , https://doi.org...
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Influence of aluminum on the elasticity of majorite-pyrope garnets

Zhaodong Liu, Steeve Gréaux, Nao Cai, Nicki Siersch, Tiziana Boffa Ballaran, Tetsuo Irifune, Dan J. Frost
Published: 01 July 2019
American Mineralogist (2019) 104 (7): 929–935.
DOI: https://doi.org/10.2138/am-2019-6771
... specimens. Both velocities and elastic moduli increase almost linearly with increasing Al content within analytical uncertainty. No significant variation of the velocities and elastic moduli is observed across the tetragonal-to-cubic phase transition at majorite with the pyrope content up to 26 mol% along...
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Inclusions in Sublithospheric Diamonds: Glimpses of Deep Earth

Thomas Stachel, Gerhard P. Brey, Jeffrey W. Harris
Journal: Elements
Published: 01 March 2005
Elements (2005) 1 (2): 73–78.
DOI: https://doi.org/10.2113/gselements.1.2.73
...FIGURE 5 150 micron-long green tetragonal-structured garnet known as TAPP (tetragonal almandine-pyrope phase), in a diamond from the São Luiz alluvial deposits, Brazil. P hoto by J effrey W. H arris ...
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Nomenclature of the garnet supergroup

Edward S. Grew, Andrew J. Locock, Stuart J. Mills, Irina O. Galuskina, Evgeny V. Galuskin, Ulf Hålenius
Published: 01 April 2013
American Mineralogist (2013) 98 (4): 785–811.
DOI: https://doi.org/10.2138/am.2013.4201
... “tetragonal almandine-pyrope phase” (TAPP) has the stoichiometry, but not the structure of garnet ( Harris et al. 1997 ; Finger and Conrad 2000 ), i.e., TAPP has edges shared between tetrahedra and octahedra, a feature not found in garnet (see below) and thus is not considered further in this report...
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The thermal equation of state of (Fe 0.86 Mg 0.07 Mn 0.07 ) 3 Al 2 Si 3 O 12 almandine

Dawei W. Fan, Wenge G. Zhou, Congqiang Q. Liu, Yonggang G. Liu, Fang Wan, Yinsuo S. Xing, Jing Liu, Ligang G. Bai, Hongsen S. Xie
Published: 01 February 2009
Mineralogical Magazine (2009) 73 (1): 95–102.
DOI: https://doi.org/10.1180/minmag.2009.073.1.95
... . ( 1999 ) measured the compressibility of synthetic almandine using a diamond-anvil cell, and reported K 0 = 185 GPa for almandine. Their results are also shown in Fig. 3 , and exhibit a close agreement with the result of this study at room temperature. The thermoelasticity of pyrope (Py) has been...
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VIII (Mg,Fe) 0.85 VI (Mg,Fe) 4 IV (Fe,Ge) 3 O 12 : A new tetragonal phase and its comparison with garnet

David Lévy, Jacques Barbier
Published: 01 July 2000
American Mineralogist (2000) 85 (7-8): 1053–1060.
DOI: https://doi.org/10.2138/am-2000-0721
... (Fig. 1 ), a new tetragonal phase, Mg 2.12 Fe 3.17 Ge 2.56 O 12 , was initially synthesized in microcrystalline form (Maïssa 1994, unpublished). This new germanate phase is an analogue of the silicate mineral identified as TAPP (tetragonal almandine pyrope phase) and recently discovered as inclusions...
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Vibrational spectroscopy of pyrope-majorite garnets: Structural implications

A.M. Hofmeister, P.A. Giesting, B. Wopenka, G.D. Gwanmesia, B.L. Jolliff
Published: 01 January 2004
American Mineralogist (2004) 89 (1): 132–146.
DOI: https://doi.org/10.2138/am-2004-0116
... ) The cubic-tetragonal phase transition in the system majorite (Mg 4 Si 4 O 12 )–pyrope (Mg 3 Al 2 Si 3 O 12 ) Physics and Chemistry of Minerals , 24 , 206 – 221 . Hirose , K. , Yagi , T. , Funakoshi , K.-I. , Fei , Y. , and Ono , S. ( 2001 ) In situ measurements of the phase...
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Raman Identification of Inclusions in Diamond

Evan M. Smith, Mandy Y. Krebs, Philomena-Theresa Genzel, Frank E. Brenker
Published: 01 July 2022
Reviews in Mineralogy and Geochemistry (2022) 88 (1): 451–473.
DOI: https://doi.org/10.2138/rmg.2022.88.08
... ). Sometimes bridgmanite contains Al, and the inclusion undergoes retrogression to an assemblage of orthopyroxene plus aluminous phases, such as jeffbenite and spinel ( Walter et al. 2011 ; Harte and Hudson 2013 ). Jeffbenite [(Mg,Fe) 3 Al 2 Si 3 O 12 ], formerly known as TAPP (tetragonal almandine-pyrope...
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Protogenetic garnet inclusions and the age of diamonds

F. Nestola, D.E. Jacob, M.G. Pamato, L. Pasqualetto, B. Oliveira, S. Greene, S. Perritt, I. Chinn, S. Milani, N. Kueter, N. Sgreva, P. Nimis, L. Secco, J.W. Harris
Journal: Geology
Published: 11 March 2019
Geology (2019) 47 (5): 431–434.
DOI: https://doi.org/10.1130/G45781.1
... , Tetragonal Almandine-Pyrope Phase, TAPP: Finally a name for it, the new mineral jeffbenite : Mineralogical Magazine , v. 80 , p. 1219 – 1232 , https://doi.org/10.1180/minmag.2016.080.059 . Nestola , F. , Jung , H. , and Taylor , L.A. , 2017 , Mineral inclusions in diamonds may...
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Cation order-disorder in Fe-bearing pyrope and grossular garnets: A 27 Al and 29 Si MAS NMR and 57 Fe Mössbauer spectroscopy study

Aaron C. Palke, Jonathan F. Stebbins, Charles A. Geiger, Gerold Tippelt
Published: 01 February 2015
American Mineralogist (2015) 100 (2-3): 536–547.
DOI: https://doi.org/10.2138/am-2015-5062
... Data. In general, XRD peaks could be indexed to pyrope- or grossular-rich garnet with no indication of minor “impurity” phases. Full structure refinements were not performed and the interatomic distances cited below for pyrope-almandine and grossular-almandine-andradite garnets are assumed...
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Single-crystal UV/Vis optical absorption spectra of almandine-bearing and spessartine garnet: Part II. An analysis of the spin-forbidden bands of Fe 2+ , Mn 2+ , and Fe 3+

Michail N. Taran, Charles A. Geiger, Oleksii A. Vyshnevskyi, George R. Rossman
Published: 01 June 2023
American Mineralogist (2023) 108 (6): 1161–1170.
DOI: https://doi.org/10.2138/am-2022-8500
...-forbidden transitions in spessartine-bearing garnets is also problematic because UV/Vis spectra were only recorded at room temperature. Moreover, it has not been possible to assign the transitions fully ( Smith and Langer 1983 ). Because we studied a series of closely binary almandine-pyrope, { Fe 3...
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