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kosmochlor

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Book Chapter

Jadeite NaAl[Si 2 O 6 ]: Kosmochlor NaCr[Si 2 O 6 ]

Author(s)
W. A. Deer, FRS, R. A. Howie, J. Zussman
Book: An Introduction to the Rock-Forming Minerals
Publisher: Mineralogical Society of Great Britain and Ireland
Published: 01 January 2013
EISBN: 9780903056434
... Jadeite Kosmochlor Monoclinic (+) Monoclinic (-) α 1.640–1.681 1.740–1.766 β 1.645–1.684 1.756–1.778 γ 1.652–1.692 1.742–1.781 δ 0.006–0.021 0.015–0.022 2V γ 60–96° 53° (2Vα) Orientation γ: z 32–55° α: z 8–22° β = y ; O.A.P. (010) β = y...
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Journal Article

Complete isomorphic join diopside–kosmochlor CaMgSi 2 O 6 –NaCrSi 2 O 6 in metamorphic rocks of the Sludyanka complex ( southern Baikal region )

L.Z. Reznitsky, E.V. Sklyarov, E.V. Galuskin
Published: 01 January 2011
Russ. Geol. Geophys. (2011) 52 (1): 40–51.
DOI: https://doi.org/10.1016/j.rgg.2010.12.004
...L.Z. Reznitsky; E.V. Sklyarov; E.V. Galuskin Abstract Chromium and vanadium-bearing metamorphic derivatives of siliceous-carbonate sediments in the Sludyanka granulite-facies complex, southern Baikal, contain high-Cr clinopyroxenes that belong to the diopside–kosmochlor–natalyite join (CaMgSi 2 O 6...
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Journal Article

Bulk modulus variation along the diopside–kosmochlor solid solution

Tiziana Boffa Ballaran, Fabrizio Nestola, Mario Tribaudino, Haruo Ohashi
Published: 01 June 2009
European Journal of Mineralogy (2009) 21 (3): 591–597.
DOI: https://doi.org/10.1127/0935-1221/2009/0021-1927
... expandable. Softening of the clinopyroxene structure with increasing diopside component is mainly due to the softening of the b direction and can be ascribed to the narrowing of the M1 octahedral chains which is greater in diopside than in kosmochlor. © 2009 E. Schweizerbart’sche Verlagsbuchhandlung...
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Journal Article

Kosmochlor and chromian jadeite aggregates from the Myanmar jadeitite area

G. H. Shi, B. Stöckhert, W. Y. Cui
Published: 01 December 2005
Mineralogical Magazine (2005) 69 (6): 1059–1075.
DOI: https://doi.org/10.1180/0026461056960308
...G. H. Shi; B. Stöckhert; W. Y. Cui Abstract Four distinct textures and related compositions of kosmochlor (Ko) and chromian jadeite in rocks from the Myanmar jadeitite area are described: (1) spheroidal or ellipsoidal aggregates with a corona texture surrounding relict chromite; (2) spheroidal...
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Journal Article

Metasomatic formation of kosmochlor-bearing diopside in peridotite xenoliths from North Island, New Zealand

Kei Ikehata, Shoji Arai
Published: 01 October 2004
American Mineralogist (2004) 89 (10): 1396–1404.
DOI: https://doi.org/10.2138/am-2004-1006
...Kei Ikehata; Shoji Arai Abstract Pale green Cr- and Na-rich diopside (kosmochlor-bearing diopside) was observed in anhydrous Group I mantle xenoliths hosted by Pliocene-Quaternary hawaiite from the Ngatutura volcanic field of the North Island, New Zealand. The diopside is characterized by high Cr 2...
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Incommensurate phase in the kosmochlor-diopside join: A new polymorph of clinopyroxene

Shizue Sakamoto, Norimasa Shimobayashi, Masao Kitamura
Published: 01 October 2003
American Mineralogist (2003) 88 (10): 1605–1607.
DOI: https://doi.org/10.2138/am-2003-1024
...Shizue Sakamoto; Norimasa Shimobayashi; Masao Kitamura Abstract Electron-diffraction patterns of clinopyroxene with an intermediate composition between kosmochlor and diopside show the presence of satellite reflections in diffuse streaks running perpendicular to (111) planes of the C 2/ c structure...
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Journal Article

High-pressure crystal structure of kosmochlor, NaCrSi 2 O 6 , and systematics of anisotropic compression in pyroxenes

Marcus J. Origlieri, Robert T. Downs, Richard M. Thompson, Carolyn J.S. Pommier, M. Bonner Denton, George E. Harlow
Published: 01 July 2003
American Mineralogist (2003) 88 (7): 1025–1032.
DOI: https://doi.org/10.2138/am-2003-0711
...Marcus J. Origlieri; Robert T. Downs; Richard M. Thompson; Carolyn J.S. Pommier; M. Bonner Denton; George E. Harlow Abstract The crystal structure of synthetic kosmochlor, NaCrSi 2 O 6 , was studied using single crystal X-ray diffraction at high pressure. A four-pin diamond anvil cell, with 4:1...
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Components in Cr-V-bearing clinopyroxenes from the Sludyanka complex (mol.%...

Components in Cr-V-bearing clinopyroxenes from the Sludyanka complex (mol.%...

Published: 01 January 2011
Fig. 9. Components in Cr-V-bearing clinopyroxenes from the Sludyanka complex (mol.%). A , Proportions of the natalyite, kosmochlor, and diopside end-members; B , diopside–kosmochlor join; C , diopside–kosmochlor joins in individual crystals.
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Composition–pressure diagram for <span class="search-highlight">kosmochlor</span>–diopside system. Solid lines ar...

Composition–pressure diagram for kosmochlor–diopside system. Solid lines ar...

Published: 01 January 2011
Fig. 1. Composition–pressure diagram for kosmochlor–diopside system. Solid lines are boundaries of solid-solution gap (hatched); points are metastable compositions synthesized at 20–22 kbar ( Ikeda and Ohashi, 1974 ; Ohashi, 1977 ). Dashed line is boundary of diopside immiscibility, after
Journal Article

Low-pressure and low-temperature K-bearing kosmochloric diopside from the Osayama serpentinite mélange, SW Japan

Tatsuki Tsujimori, Juhn G. Liou
Published: 01 October 2005
American Mineralogist (2005) 90 (10): 1629–1635.
DOI: https://doi.org/10.2138/am.2005.1749
...Tatsuki Tsujimori; Juhn G. Liou Abstract Kosmochloric diopside with high K content up to 0.56 wt% (0.026 K atom per formula unit) was discovered from the Osayama serpentinite mélange in the Chugoku Mountains, SW Japan. K-bearing clinopyroxene fills microcracks (5–150 μm in wide) together...
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Photomicrographs (plane-polarized light) of (a) coronal <span class="search-highlight">kosmochlor</span> aggregat...

Photomicrographs (plane-polarized light) of (a) coronal kosmochlor aggregat...

Published: 01 March 2012
Fig. 5 Photomicrographs (plane-polarized light) of (a) coronal kosmochlor aggregates with a core of low-Cr jadeite (Sample K15A). (b) Replacement texture of chromite by kosmochlor (K13).
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Variation of ∠O3-O3-O3 in two Na-clinopyroxenes (jadeite and <span class="search-highlight">kosmochlor</span>) wi...

Variation of ∠O3-O3-O3 in two Na-clinopyroxenes (jadeite and kosmochlor) wi...

Published: 01 January 2008
F igure 7. Variation of ∠O3-O3-O3 in two Na-clinopyroxenes (jadeite and kosmochlor) with pressure at room temperature. Kosmochlor data from Origlieri et al. (2003) . Estimated errors in P are significantly smaller than the symbols used.
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Oriented unit strain ellipsoid for <span class="search-highlight">kosmochlor</span> overlying a cartoon of the ko...

Oriented unit strain ellipsoid for kosmochlor overlying a cartoon of the ko...

Published: 01 July 2003
F igure 2. Oriented unit strain ellipsoid for kosmochlor overlying a cartoon of the kosmochlor structure viewed down b . CrO 6 and SiO 4 are depicted as polyhedra and Na as a sphere. The softest compression direction is parallel to the long axis of the ellipsoid and roughly parallel to (3̅02).
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Variation of ∠O3-O3-O3 in the Na-clinopyroxenes aegirine, jadeite, and kosm...

Variation of ∠O3-O3-O3 in the Na-clinopyroxenes aegirine, jadeite, and kosm...

Published: 01 November 2008
F igure 5. Variation of ∠O3-O3-O3 in the Na-clinopyroxenes aegirine, jadeite, and kosmochlor, with pressure at room temperature. Jadeite data from McCarthy et al. (2008) ; kosmochlor data from Origlieri et al. (2003) . Estimated errors in P are significantly smaller than symbols used.
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BSE images of undeformed coarse-grained pyroxene rocks composed predominant...

BSE images of undeformed coarse-grained pyroxene rocks composed predominant...

Published: 01 December 2005
F ig . 5. BSE images of undeformed coarse-grained pyroxene rocks composed predominantly of chromian clinopyroxene, sample K13; ( a ) relict chromite surrounded by coexisting kosmochlor and chromian jadeite; ( b ) close-up view from the same area showing coexisting kosmochlor and chromian jadeite
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Components (cp) of the thermal expansion along the b axis, as shown in F...

Components (cp) of the thermal expansion along the b axis, as shown in F...

Published: 01 March 2005
Table 5. Components (cp) of the thermal expansion along the b axis, as shown in Fig. 2 , for diopside, Di 50 Ko 50 , kosmochlor and jadeite. The expansion coefficient is defined as (1/cp 0 ) * (∂cp/∂T), with cp 0 the component at room temperature. References: for Di 50 Ko 50 this work
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Backscattered electron (BSE) images of spheroidal or ellipsoidal aggregate ...

Backscattered electron (BSE) images of spheroidal or ellipsoidal aggregate ...

Published: 01 December 2005
F ig . 3. Backscattered electron (BSE) images of spheroidal or ellipsoidal aggregate with residual chromite core, sample M1 (type 1); ( a ) overview of spheroidal aggregates; ( b ) close-up of border between relict chromite and radiating kosmochlor needles or prisms; ( c ) close-up of area
Journal Article

Mineralogy of jadeitite and related rocks from Myanmar: a review with new data

Guanghai Shi, George E. Harlow, Jing Wang, Jun Wang, Enoch Ng, Xia Wang, Shumin Cao, Wenyuan Cui
Published: 01 March 2012
European Journal of Mineralogy (2012) 24 (2): 345–370.
DOI: https://doi.org/10.1127/0935-1221/2012/0024-2190
...Fig. 5 Photomicrographs (plane-polarized light) of (a) coronal kosmochlor aggregates with a core of low-Cr jadeite (Sample K15A). (b) Replacement texture of chromite by kosmochlor (K13). ...
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<span class="search-highlight">Kosmochlor</span>–natalyite pyroxene with a large partly resorbed inclusion ( A ) ...

Kosmochlor–natalyite pyroxene with a large partly resorbed inclusion ( A ) ...

Published: 01 November 2019
Fig. 7. Kosmochlor–natalyite pyroxene with a large partly resorbed inclusion ( A ) and numerous small karelianite–eskolaite inclusions ( B ).
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Comparison of the model relationship between β and O3-O3-O3 angle with the ...

Comparison of the model relationship between β and O3-O3-O3 angle with the ...

Published: 01 April 2004
F igure 12. Comparison of the model relationship between β and O3-O3-O3 angle with the observed for diopside at P ( Levien and Prewitt 1981 ) and T ( Cameron et al. 1973 ), hedenbergite at P ( Zhang et al. 1997 ) and T ( Cameron et al. 1973 ), and kosmochlor at P ( Origlieri et al