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Johnstown Meteorite

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Journal Article
Published: 01 January 2000
European Journal of Mineralogy (2000) 12 (1): 163–176.
...Rolf HEINEMANN; Herbert KROLL; Falko LAGENHORST; Tore LUEDER Abstract The partitioning of Fe 2+ and Mg on the M1 and M2 sites of orthopyroxenes from the Johnstown meteoritic diogenite has been equilibrated between 1000°C and 700°C in ordering and disordering runs. The method of bivariate high order...
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Journal Article
Published: 01 August 2008
European Journal of Mineralogy (2008) 20 (4): 551–561.
...Rolf Heinemann; Herbert Kroll; Falko Langenhorst Abstract The Fe 2+ , Mg order/disorder process in orthopyroxenes from the Johnstown meteoritic diogenite is extremely slow. It is controlled by an activation energy of ≈ 100 kcal/mol, whereas in other orthopyroxenes with similar compositions...
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Journal Article
Published: 01 March 2003
European Journal of Mineralogy (2003) 15 (2): 373–380.
... the Johnstown meteorite. * email address of the corresponding author: zema@crystal.unipv.it 28 10 2002 20 02 2002 15 06 2002 E. Schweizerbart'sche Verlagsbuchhandlung, D-70176 Stuttgart 2003 The chemical compositions of the same crystals used for X-ray single-crystal...
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Journal Article
Published: 01 July 2000
European Journal of Mineralogy (2000) 12 (4): 735–748.
... experiments. All conflicting results were obtained on orthopyroxene crystals of the Johnstown meteorite. Orthopyroxene from this meteorite has been previously studied by TEM by Mori & Takeda (1981) , who described exsolution products as (i) frequent augite exsolution lamellae several unitcell wide...
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Journal Article
Published: 01 October 2014
American Mineralogist (2014) 99 (10): 2043–2048.
... variation of the intracrystalline Fe 2+ , Mg fractionation in Johnstown meteoritic orthopyroxene . European Journal of Mineralogy , 12 , 163 – 176 . Heinemann R. Kroll H. Langenhorst F. ( 2008 ) Relationship between Guinier-Preston zones and the kinetics of the intracrystalline Fe 2...
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Journal Article
Published: 01 June 1976
American Mineralogist (1976) 61 (5-6): 373–378.
...R. Gooley; C. B. Moore Abstract Metal particles in eight of the nine known diogenites have been analyzed for Fe, Co, and Ni by electron microprobe. Those in Shalka, Tatahouine, Garland, and the majority in Ellemeet contain less than 1.5 weight percent Ni. The metal in Johnstown ranges from 2.5...
Journal Article
Published: 01 July 2002
American Mineralogist (2002) 87 (7): 838–844.
... of Minerals , 26 , 322 – 332 . Heinemann , R. , Kroll , H. , Langenhorst , F. , and Lueder , T. ( 2000 ) Time and temperature variation of the intracrystalline Fe 2+ , Mg fractionation in Johnstown meteoritic orthopyroxene . European Journal of Mineralogy , 12 , 163 – 176...
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Journal Article
Published: 01 July 2001
European Journal of Mineralogy (2001) 13 (4): 715–726.
... by Heinemann et al. (2000) on orthopyroxenes from the Johnstown meteorite. Fig. 6. Ordering path of bronzite crystal BNZ2ST-2: variation of X̄ Fe M2 with time. The equilibrium curve derives from equation (4) . Domeneghetti & Steffen (1992) performed site refinements assuming unit...
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Journal Article
Published: 01 January 2005
American Mineralogist (2005) 90 (1): 155–161.
.... , Langenhorst , F. , and Lueder , T. ( 2000 ) Time and temperature variation of the intracrystalline Fe 2+ , Mg fractionation in Johnstown meteoritic orthopyroxene . European Journal of Mineralogy , 12 , 163 – 176 . Kroll , H. , Lueder , T. , Schlenz , H. , Kirfel...
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Journal Article
Published: 01 November 2005
American Mineralogist (2005) 90 (11-12): 1816–1823.
... 2+ , Mg fractionation in Johnstown meteoritic orthopyroxene . European Journal of Mineralogy , 12 , 163 – 176 . Ibers , J.A. and Hamilton , W.C. , Eds. ( 1974 ) International Tables for X-ray Crystallography , vol. 4 , pp. 99 – 101 . Kynoch Press , Birmingham, U.K...
FIGURES
Journal Article
Published: 01 January 2009
American Mineralogist (2009) 94 (1): 176–180.
... Summit chromium augite‡ SiO 2 (cpx), Al 2 O 3 (ol, cpx, opx), FeO* (cpx), MgO (cpx), Ca (ol, cpx, opx, spn) Corundum Al 2 O 3 (spn) Johnstown Meteorite hypersthene SiO 2 (opx), FeO* (opx), MgO (opx) Kakanui augite Al 2 O 3 (glass), MgO (glass) Kakanui hornblende TiO 2 (all...
Journal Article
Published: 01 November 2014
American Mineralogist (2014) 99 (11-12): 2203–2210.
... of the intracrystalline Fe 2+ , Mg fractionation in Johnstown meteoritic orthopyroxene . European Journal of Mineralogy , 12 , 163 – 176 . Irvine T.N. ( 1965 ) Chromian spinel as a petrogenetic indicator . Canadian Journal of Earth Sciences , 2 , 648 – 672 . Lavina B. Salviulo G. Della...
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Journal Article
Published: 01 July 2000
American Mineralogist (2000) 85 (7-8): 953–962.
... , 863 – 875 . Molin , G.M. , Saxena , S.K. , and Brizi , E. ( 1991 ) Iron-magnesium order-disorder in an orthopyroxene crystal from the Johnstown meteorite . Earth and Planetary Science Letters , 105 , 260 – 265 . Morimoto , N. and Güven , N. ( 1970 ) Refinement...
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Journal Article
Published: 01 August 2002
American Mineralogist (2002) 87 (8-9): 1250–1256.
... in orthopyroxenes, locally in symplectic association with chromites, or associated with metal, have been characterized for the first time in a diogenite. Mosaicism of the orthopyroxenes indicates shock effects in the meteorite. The shock history of the meteorite must be consistent with the presence of vein-like...
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Journal Article
Published: 01 August 2013
American Mineralogist (2013) 98 (8-9): 1526–1534.
... of the intracrystalline Fe 2+ , Mg exchange reaction in Johnstown meteoritic orthopyroxene . European Journal of Mineralogy , 20 , 551 – 561 . Ibers J.A. Hamilton W.C. ( 1974 ) International Tables for X-ray Crystallography . Kynoch Press , Birmingham, U.K. , vol. 4 ., 99 – 101 . Klein H...
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Journal Article
Published: 01 April 2008
Earth Sciences History (2008) 27 (1): 136–150.
... descriptions it provides, but the many geological gems that are found within will keep the interest of any earth scientist. The translators have brought the English reader a really good story—that happens to be true. William R. Brice, Geology & Planetary Science, University of Pittsburgh at Johnstown...
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Journal Article
Published: 01 October 2001
Earth Sciences History (2001) 20 (2): 196–228.
..., Halifax, Nova Scotia, Canada; bshipley@is2.dal.ca CATALOGUE OF METEORITES, 5TH EDITION. Monica M. Grady. 2000. Cambridge University Press, Cambridge, U.K. 689 p. Hardcover, $150.00. (Includes CD-ROM.) In 1849 Henry Clifton Sorby became the first geologist to make thin sections of rocks...
Journal Article
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 50 (1): 77–120.
... Be occurs in meteorites recovered soon after observed falls as well as in meteorites that were found many years after they fell. Only four achondritic meteorites have been analyzed for Be: an aubrite (Norton County, highly reduced pyroxenite) and three HED meteorites (Johnstown, Pasamonte, and Sioux...
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Journal Article
Published: 01 April 2021
Geochemical Perspectives (2021) 10 (1): 31–40.
... of the intracrystalline Fe 2+ , Mg fractionation in Johnstown meteoritic orthopyroxene . European Journal of Mineralogy 12 , 163 - 176 . Helffrich , G.H. , Wood , B.J. ( 1989 ) Subregular model for multicomponent solutions . American Mineralogist 74 , 1016 - 1022 . Hillert , M. ( 1998...
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Journal Article
Published: 01 October 2000
American Mineralogist (2000) 85 (10): 1375–1382.
... order-disorder in an orthopyroxene crystal from the Johnstown meteorite . Earth and Planetary Science of Letters , 105 , 260 – 265 . North , A.C.T. , Phillips , D.C. , and Mathews , F.S. ( 1968 ) A semi-empirical method of absorption correction . Acta Crystallographica , A24...
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