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pyroxenoid

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Journal Article
Published: 22 April 2019
Mineralogical Magazine (2019) 83 (3): 473-478.
.... Nagashima M. , Imaoka T. , Fukuda C. and Pettke T. ( 2018 ) Relationship between cation substitution and hydrogen-bond system in hydrous pyroxenoids with three-periodic single-chains of SiO 4 tetrahedra: pectolite, murakamiite, marshallsussmanite, serandite and tanohataite . European...
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Journal Article
Published: 01 February 2017
Mineralogical Magazine (2017) 81 (1): 183-197.
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Journal Article
Published: 01 June 2015
Mineralogical Magazine (2015) 79 (3): 671-686.
...R. H. Mitchell; M. D. Welch; A. R. Kampf; A. K. Chakhmouradian; J. Spratt Abstract The new pyroxenoid barrydawsonite-(Y) occurs at the Merlot Claim, North Red Wine Pluton, Labrador, Canada (62°32′38.54″ W; 54°08′1.37″ N). The host rock is a metamorphosed eudialyte syenite consisting of eudialyte...
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Journal Article
Journal: Economic Geology
Published: 01 December 1998
Economic Geology (1998) 93 (8): 1390-1405.
..., manganiferous, pyroxene-pyroxenoid, Ca-rich garnet alteration assemblages. The latter include hedenbergite, pyroxferroite-pyroxmangite, fayalite, calcic almandine, quartz, and apatite. Immobile element concentrations and mass balance considerations demonstrate that rocks with the pyroxene-pyroxenoid-garnet...
Journal Article
Published: 01 April 1992
American Mineralogist (1992) 77 (3-4): 380-390.
...Kenneth J. T. Livi; David R. Veblen Abstract Two occurrences of johannsenite partially altered to pyroxenoid minerals were studied by X-ray emission analytical electron microscopy in the context of the pyroxene-wollas-tonite polysomatic series in order to determine the relationships between...
Journal Article
Published: 01 June 1991
American Mineralogist (1991) 76 (5-6): 900-903.
...Ross J. Angel; Charles W. Burnham Abstract Previous discussions of the pyroxenoid and clinopyroxene crystal structures have noted the polysomatic relationship between them, in which pyroxenoids with chain periodicities greater than three contain both pyroxeno-like (P) and wollastonite-like (W...
Journal Article
Published: 01 April 1990
American Mineralogist (1990) 75 (3-4): 409-414.
...Donald R. Peacor; Pete J. Dunn; John S. White; Joel D. Grice; Peter H. Chi Abstract Lithiomarsturite, ideally LiCa 2 Mn 2 HSi 5 O 15 , is a new member of the p-p (pectolite-pyroxene) series of pyroxenoids (hydropyroxenoids). It has a structure based on fünferket-ten , but chain-periodicity faults...
Journal Article
Published: 01 October 1985
American Mineralogist (1985) 70 (9-10): 885-901.
...David R. Veblen Abstract A specimen of the CaMn clinopyroxene johannsenite that has partially reacted to Mn pyroxenoids has been studied with high-resolution transmission electron microscopy (HRTEM), electron diffraction, and single-crystal X-ray methods. The primary johannsenite is structurally...
Journal Article
Published: 01 February 1981
American Mineralogist (1981) 66 (1-2): 154-168.
Journal Article
Published: 01 October 1980
American Mineralogist (1980) 65 (9-10): 981-985.
...Friedrich Liebau Abstract In pyroxenoids containing cationic hydrogen [pectolite, schizolite, serandite, unnamed Ca(Sc,Fe 3+ )H[Si 3 O 9 ], synthetic Cd 2 NaH[Si 3 O 9 ], nambulite, Li-hydrorhodonite, santaclaraite, and babingtonite] the identity periods of the silicate chains are approximately...
Journal Article
Published: 01 April 1978
American Mineralogist (1978) 63 (3-4): 274-288.
Journal Article
Published: 01 March 2003
European Journal of Mineralogy (2003) 15 (2): 381-391.
...Gian Carlo CAPITANI; Henry Bernard GROBÉTY; Marcello MELLINI Abstract The late crystallisation stages of Campiglia Marittima skarn are characterised by an increase in Mn-activity at the meta-somatic front. Mn-pyroxenoids became stable with respect to johannsenite. The pyroxene-pyroxenoid textures...
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Journal Article
Published: 01 December 1986
American Mineralogist (1986) 71 (11-12): 1441-1454.
...Ross John Angel Abstract The single-chain silicate structures of clinopyroxene, bustamite, and pyroxenoids are compared. The possible types of transformations between these structures are then characterized in terms of the change in lattice type accompanying the structural transformation. Four...
Journal Article
Published: 01 November 2016
American Mineralogist (2016) 101 (11): 2544-2553.
...Richard M. Thompson; Hexiong Yang; Robert T. Downs Abstract A hypothetical ideal wollastonite with regular octahedra and T3 tetrahedron is presented and used to compare and contrast the pyroxenes and pyroxenoids. While clinopyroxenes have close-packed arrangements of oxygen anions, several lines...
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Journal Article
Journal: Economic Geology
Published: 01 December 1998
Economic Geology (1998) 93 (8): 1463-1488.
... proportions of Pb and Zn. Graphitic and quartz-rich, banded olivine-pyroxenoid types display laterally continuous, fine compositional banding over meter scales, and granoblastic sulfide-silicate textures with spheroidal sulfide inclusions in all silicates. Deformation is evidenced by D 2 structures...
Journal Article
Journal: Economic Geology
Published: 01 May 1987
Economic Geology (1987) 82 (3): 523-545.
... southwest end of the mine where highest Zn, Pb, and total metal grades also occur.Endoskarn is zoned in terms of the relative proportions and manganese content of epidote and chlorite. In the Northeast zone, skarn is zoned away from dikes in the sequence: garnet to pyroxene to pyroxenoid to marble...
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Mn–Ca-(Fe + Mg) plot of <b>pyroxenoid</b> compositions from the Luziyuan mine. Das...
Published: 18 January 2018
Figure 11. Mn–Ca-(Fe + Mg) plot of pyroxenoid compositions from the Luziyuan mine. Dashed lines indicate miscibility gap between rhodonite and bustamite at T = 550 °C (Abrecht & Peters, 1980 ).
Image
The relationships between the pyroxene and <b>pyroxenoid</b> O-chains for ( a ) rh...
Published: 01 November 2016
Figure 10 The relationships between the pyroxene and pyroxenoid O-chains for ( a ) rhodonite ( Peacor et al. 1978 ), ( b ) pyroxmangite ( Zanazzi et al. 2008 ), and ( c ) ferrosilite III ( Weber 1983 ), which have T-chain repeat lengths of 5, 7, and 9, respectively.
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Triangular plot of the pyroxene&#x2F;<b>pyroxenoid</b> composition. The end-member comp...
Published: 01 August 2004
F igure 5. Triangular plot of the pyroxene/pyroxenoid composition. The end-member compositions are CaSiO 3 , MgSiO 3 , FeSiO 3 , respectively. ( a ) Wollastonite, hedenbergite, and diopside-hedenbergite ss compositions for the rim around the Allende dark inclusion IV-1 (filled circles
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Sample Cr4&#x2F;D3. Interface between johannsenite and a disordered <b>pyroxenoid</b>. ...
Published: 01 March 2003
Fig. 5. Sample Cr4/D3. Interface between johannsenite and a disordered pyroxenoid. Diffraction patterns of the disordered pyroxenoid (upper right) and johannsenite (lower right) are also given. Beam parallel to [101] of johannsenite.