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hexamolybdenum

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Journal Article
Published: 01 April 2014
American Mineralogist (2014) 99 (4): 654-666.
... Zr 3 O 12 , a new Sc- and Zr-rich oxide; and hexamolybdenum (Mo,Ru,Fe,Ir,Os), a Mo-dominant alloy. Allendeite is trigonal, R 3̄, a = 9.396, c = 8.720, V = 666.7 Å 3 , and Z = 3, with a calculated density of 4.84 g/cm 3 via the previously described structure and our observed chemistry. Hexamolybdenum...
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( a ) EBSD pattern of the 1.2 mm <b>hexamolybdenum</b> from  ACM-1  ( Fig. 3 ). Th...
Published: 01 April 2014
Figure 6 ( a ) EBSD pattern of the 1.2 mm hexamolybdenum from ACM-1 ( Fig. 3 ). The circle and cross have the same meaning as in Figure 5 . ( b ) The pattern is best indexed using the P 6 3 / mmc structure of the synthetic Mo 55 Ru 45 phase described by Anderson and Hume-Rothery (1960) .
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BSE images showing one <b>hexamolybdenum</b> grain in a fine-grained inclusion fro...
Published: 01 April 2014
Figure 7 BSE images showing one hexamolybdenum grain in a fine-grained inclusion from USNM polished thin section 3509HC12 with contrast optimized for ( a ) silicates and oxides and ( b ) alloys. Note the difference in Z contrast between hexamolybdenum and the Ni-Fe-Ir-Ru alloy in the upper left
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Backscatter electron images showing ( a ) an euhedral <b>hexamolybdenum</b> grain ...
Published: 01 May 2011
F igure 3. Backscatter electron images showing ( a ) an euhedral hexamolybdenum grain enclosed in krotite near the rim of the CAI in USNM 7590 and ( b ) an euhedral hexamolybdenum grain enclosed in grossite in UA2169TS3.
Journal Article
Published: 01 May 2011
American Mineralogist (2011) 96 (5-6): 709-715.
...F igure 3. Backscatter electron images showing ( a ) an euhedral hexamolybdenum grain enclosed in krotite near the rim of the CAI in USNM 7590 and ( b ) an euhedral hexamolybdenum grain enclosed in grossite in UA2169TS3. ...
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BSE images showing a portion of  ACM-1  (cf.  Fig. 1 ). ( a ) Region contai...
Published: 01 April 2014
Figure 3 BSE images showing a portion of ACM-1 (cf. Fig. 1 ). ( a ) Region containing hexamolybdenum, allendeite, perovskite, and Os-Ir-Mo-W alloys. ( b ) Enlarged BSE image showing the hexamolybdenum crystal (1.2 μm across).
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Backscattered electron (BSE) image of the ultrarefractory inclusion  ACM-1 ...
Published: 01 April 2014
Figure 1 Backscattered electron (BSE) image of the ultrarefractory inclusion ACM-1 containing allendeite and hexamolybdenum in polished Allende section USNM 7554.
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Calculated fields for condensate  P 6 3 / mmc  mineral alloys in a cooling ...
Published: 01 April 2014
Figure 11 Calculated fields for condensate P 6 3 / mmc mineral alloys in a cooling gas of solar composition. The field for hexamolybdenum is shaded. Lines represent the loci of points for which the two elements with the highest concentrations in the condensate alloy are equal.
Journal Article
Published: 01 January 2010
American Mineralogist (2010) 95 (1): 188-191.
... allendeite (Sc 4 Zr 3 O 12 ) and hexamolybdenum (Mo,Ru,Fe) ( Ma et al. 2009a ), monipite (MoNiP) ( Ma et al. 2009b ), tistarite (Ti 2 O 3 ) ( Ma and Rossman 2009a ), davisite (CaScAlSiO 6 ) ( Ma and Rossman 2009b ), and grossmanite (CaTi 3+ AlSiO 6 ) ( Ma and Rossman 2009c ). Each new phase adds a new voice...
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Journal Article
Published: 01 August 2011
American Mineralogist (2011) 96 (8-9): 1199-1206.
..., the Cracked Egg CAI consists mostly of large krotite crystals with interstitial phase assemblages consisting of gehlenite, perovskite, hercynite, and brearleyite. There are also a few hexamolybdenum crystals included in krotite near the outer margins of the inclusion. Surrounding the entire inclusion is a rim...
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Journal Article
Published: 01 May 2009
American Mineralogist (2009) 94 (5-6): 845-848.
... mineral from the Benitoite Mine, California. American Mineralogist , 93 , 154 –157. ——— ( 2009 ) Tistarite, Ti 2 O 3 , a new refractory mineral from the Allende meteorite. American Mineralogist , 94 , 841 –844. Ma, C., Beckett, J.R., and Rossman, G.R. ( 2009 ) Allendeite and hexamolybdenum: Two...
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Journal Article
Published: 01 May 2016
American Mineralogist (2016) 101 (5): 1161-1170.
... or cubic (in certain orientations) crystal. These angles may refer to the outline of a precursor crystal included in spinel (e.g., a P 6 3 / mmc alloy such as hexamolybdenum) or a negative crystal imposed by the host spinel. The latter requires that both of the majindeite occurrences sample a plane...
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Journal Article
Published: 01 January 2014
American Mineralogist (2014) 99 (1): 198-205.
... with the catalog number USNM 7554. Type allendeite, grossmanite, hexamolybdenum, and hibonite-(Fe), which were described by Ma and Rossman (2009b) , Ma et al. (2009b) , and Ma (2010) , are also present in this section. The monipite crystal ( Fig. 2 ) is in contact with a Ru-Mo-Ni metal grain (Ru 0.47 Mo...
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Journal Article
Journal: Elements
Published: 01 February 2010
Elements (2010) 6 (1): 19-23.
... Ma C , Beckett JR , Rossman GR ( 2009 ) Allendeite and hexamolybdenum: Two new ultra-refractory minerals in Allende and two missing links . 40 th Lunar and Planetary Science Conference , Abstract 1402 MacPherson GJ ( 2004 ) Calcium-aluminum-rich inclusions in chondritic...
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Journal Article
Published: 01 December 2018
American Mineralogist (2018) 103 (12): 1918-1924.
... the Allende meteorite . American Mineralogist , 99 , 198 – 205 . Ma , C. , Beckett . J.R. , and Rossman , G.R. ( 2014b ) Allendeite (Sc 4 Zr 3 O 12 ) and hexamolybdenum (Mo,Ru,Fe), two new minerals from an ultra-refractory inclusion from the Allende meteorite . American Mineralogist...
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Journal Article
Published: 24 July 2015
The Canadian Mineralogist (2015) 53 (2): 295-324.
.... , buseckite [(Fe,Zn,Mn)S] and hexamolybdenum (Mo,Ru,Fe) ( Table 2 ), in which case only the most abundant element is considered, i.e. , FeS and Mo, respectively. This approach in treating mineral compositions means that our tabulations of the number of minerals for each element ( Tables 1 , 2 ) are minimum...
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Journal Article
Published: 01 June 2016
American Mineralogist (2016) 101 (6): 1245-1251.
... inclusion . American Mineralogist , 99 , 667 – 670 . Ma C. Beckett J.R. Rossman G.R. ( 2014 ) Allendeite (Sc 4 Zr 3 O 12 ) and hexamolybdenum (Mo,Ru,Fe), two new minerals from an ultrarefractory inclusion from the Allende meteorite . American Mineralogist , 99 , 654 – 666...
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Journal Article
Published: 01 July 2012
American Mineralogist (2012) 97 (7): 1219-1225.
.... ( 2009 ) Allendeite and hexamolybdenum: Two new ultra-refractory minerals in Allende and two missing links . 40th Lunar and Planetary Science Conference , Abstract 1402 . Ma C. Tschauner O. Beckett J.R. Kiefer B. Rossman G.R. Liu W . ( 2011a ) Discovery of panguite, a new...
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Journal Article
Published: 01 May 2013
American Mineralogist (2013) 98 (5-6): 870-878.
.... Rossman G.R. ( 2009 ) Allendeite and hexamolybdenum: Two new ultra-refractory minerals in Allende and two missing links . Lunar and Planetary Science 40 , Abstract 1402. Ma C. Beckett J.R. Tschauner O. Rossman G.R. ( 2011 ) Thortveitite (Sc 2 Si 2 O 7 ), the first solar...
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