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crichtonite group

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Journal Article
Published: 01 May 2019
American Mineralogist (2019) 104 (5): 761–774.
...Dmitriy I. Rezvukhin; Taisia A. Alifirova; Andrey V. Korsakov; Alexander V. Golovin Abstract Large-ion lithophile elements (LILE)-enriched chromium titanates of the magnetoplumbite (AM 12 O 19 ) and crichtonite (ABC 18 T 2 O 38 ) groups have been recognized as abundant inclusions in orthopyroxene...
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Journal Article
Published: 01 May 2017
European Journal of Mineralogy (2017) 29 (2): 331–338.
...Xiangkun Ge; Guang Fan; Guowu Li; Ganfu Shen; Zhangru Chen; Yujie Ai Mianningite (IMA 2014-072), ideally (☐,Pb,Ce,Na)(U 4+ ,Mn,U 6+ )Fe 3+ 2 (Ti,Fe 3+ ) 18 O 38 , is a new member of the crichtonite group from the Maoniuping REE deposit, Mianning county, Sichuan province, China. It was found...
Journal Article
Published: 01 April 2015
Mineralogical Magazine (2015) 79 (2): 269–283.
... with I > 3σ( I ). Almeidaite is a member of the crichtonite group with Pb dominant in the A site (with 12-fold coordination) and Zn dominant in the T site (with 4-fold coordination). It is a Zn analogue of senaite and a Pb analogue of landauite. The mineral is named after Professor Fernando Flávio...
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Journal Article
Published: 01 June 2014
European Journal of Mineralogy (2014) 26 (3): 427–437.
.... The crystal structures of mapiquiroite from these two occurrences were refined to R 1 = 0.028 and 0.032, respectively. Mapiquiroite is isostructural with other members of the crichtonite group. The name mapiquiroite honours four Italian mineral collectors, Riccardo Mazzanti, Luigi Pierotti, Ugo Quilici...
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Journal Article
Published: 01 October 2012
European Journal of Mineralogy (2012) 24 (6): 1061–1067.
.... The crystal structure was refined to R = 0.0234 for 632 reflections with I o > 2σ( I o ) and is isostructural with senaite and all other members of the crichtonite group. The eight strongest X-ray powder-diffraction lines [ d in Å ( I/I 0 ) ( hkl )] are: 3.417 (100) (024), 3.012 (21) (300), 2.896 (61...
FIGURES
Journal Article
Published: 01 July 2006
European Journal of Mineralogy (2006) 18 (4): 493–502.
..., related to crichtonite, landauite and davidite-(Ce,La), may represent potentially new members of the crichtonite group. They display compositional zoning, and are associated with diverse oxide minerals, albite and alkali feldspar. Our compositions (EMP) suggest that the “large cations” (Sr, Na, K...
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Journal Article
Published: 01 November 2005
European Journal of Mineralogy (2005) 17 (6): 933–942.
...Pierre-Alain WÜLSER; Nicolas MEISSER; Joël BRUGGER; Kurt SCHENK; Stefan ANSERMET; Michel BONIN; François BUSSY Abstract Cleusonite, (Pb,Sr)(U 4+ ,U 6+ ) (Fe 2+ ,Zn) 2 (Ti,Fe 2+ ,Fe 3+ ) 18 (O,OH) 38 , is a new member of the crichtonite group. It was found at two occurrences in greenschist facies...
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Journal Article
Published: 01 January 2004
European Journal of Mineralogy (2004) 16 (1): 171–175.
...Paolo ORLANDI; Marco PASERO; Nicola ROTIROTI; Filippo OLMI; Francesco DEMARTIN; Yves MOËLO Abstract Gramaccioliite-(Y) is a new mineral within the crichtonite group. It was found in the gneiss of the Hercynian Massif of Argentera, at Sambuco (Stura Valley, Piedmont, Italy). It occurs as black...
FIGURES
Journal Article
Published: 01 August 1997
American Mineralogist (1997) 82 (7-8): 807–811.
...Paolo Orlandi; Marco Pasero; Giuseppe Duchi; Filippo Olmi Abstract Dessauite, a new mineral in the crichtonite group, occurs within cavities in calcite veins as tabular {001} rhombohedral, black, millimeter-sized crystals at Buca della Vena Mine, Apuan Alps (Tuscany, Italy). It is associated...
Journal Article
Published: 01 February 1978
American Mineralogist (1978) 63 (1-2): 28–36.
... of 0.043. Loveringite is isostructural with senaite and crichtonite, with a structure based on a nine-layer ( hhc ···) close-packed anion lattice in which the A cation occupies an anion site and the M cations are ordered into 19 octahedral and 2 tetrahedral sites per unit cell. Microprobe analyses...
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Chemical variability in members of the <b>crichtonite</b> <b>group</b> with M0 = Sr or Pb...
Published: 01 June 2014
Fig. 4 Chemical variability in members of the crichtonite group with M0 = Sr or Pb and M1 = Y or U. Data are from Bermanec et al . (1992) , Orlandi et al . (1997 , 2004b ) and Wülser et al . (2005) .
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Compositions of the Sr-Na-REE minerals of the <b>crichtonite</b> <b>group</b> from the fe...
Published: 01 July 2006
Fig. 4. Compositions of the Sr-Na-REE minerals of the crichtonite group from the fenitized megaxenolith, Khibina complex, in the Na-Sr-(Ce+La) compositional space (atomic proportions). Results of a total of 1408 electron-microprobe analyses (WDS; this study) are plotted.
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Structural formula of the <b>crichtonite</b> <b>group</b> members.
Published: 01 November 2005
Table 1. Structural formula of the crichtonite group members.
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Minerals of the <b>crichtonite</b> <b>group</b> with dominating MO and MI cations.
Published: 01 January 2004
Table 1. Minerals of the crichtonite group with dominating MO and MI cations.
Journal Article
Published: 01 June 2010
European Journal of Mineralogy (2010) 22 (3): 443–452.
...Thomas Theye; Frédéric Hatert; Ewald Ockenga; Christian Bertoldi; Christian Lathe Abstract We describe a second occurrence of the recently defined mineral species gramaccioliite-(Y), a member of the crichtonite group, on Samos Island, Greece. The mineral occurs in form of centimetre-sized...
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Journal Article
Published: 01 June 1989
American Mineralogist (1989) 74 (5-6): 668–675.
... in maximum dimension), is in intimate association with lindsleyite (Ba,Sr)(Ti,Cr.. .) 21 O 38 , a member of the crichtonite group, accessory niobian chromian rutile, and magnesian chromian ilmenite in host-replacement-textured magne-sian chromite. Hawthomeite is isostructural with magnetoplumbite Pb(Fe,Mn...
Journal Article
Published: 01 October 1979
American Mineralogist (1979) 64 (9-10): 1010–1017.
... Ti 12.53 Fe 5.97 Mg 0.24 Cr 0.21 Al 0.14 (Mn,V,Zr,Nb,Sc) 0.23 O 38 . In its natural state the mineral is metamict. The crystal structure was reconstituted by heating in air at 920°C for two hours. Davidite is isostructural with the crichtonite-group minerals, having a structure based on a close...
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A-site occupancy of the studied yimengite-hawthorneite ( a ) and <b>crichtonit</b>...
Published: 01 May 2019
Figure 6. A-site occupancy of the studied yimengite-hawthorneite ( a ) and crichtonite-group minerals ( b ) showed within Ba–K–Ca+Sr+Na+LREE ternary space in comparison with literature data. 1 = inclusions of yimengite-hawthorneite in orthopyroxene (this study); 2 = mantle-derived magnetoplumbite
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Transmitted-light images showing mineral relationships and occurrences of c...
Published: 01 May 2019
Figure 4. Transmitted-light images showing mineral relationships and occurrences of crichtonite-group minerals in silicates. CGM = crichtonite-group mineral; Spl = spinel; Rt = rutile; Opx = orthopyroxene; Grt = garnet. (Color online.)
Journal Article
Published: 01 May 2000
American Mineralogist (2000) 85 (5-6): 792–800.
... inclusions of rutile, srilankite, ilmenite, minerals of the crichtonite group, spinel, and olivine. Carmichaelite is commonly in contact with rutile and occasionally with srilankite. The average composition is TiO 2 = 62.16, Cr 2 O 3 = 18.43, Al 2 O 3 = 1.88, V 2 O 3 = 0.87, Nb 2 O 5 = 0.37, FeO = 7.61, MgO...
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