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landauite

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Journal Article
Published: 01 February 1978
The Canadian Mineralogist (1978) 16 (1): 63–68.
Journal Article
Published: 01 December 2002
The Canadian Mineralogist (2002) 40 (6): 1609–1627.
...Volker Stähle; Mario Koch; Catherine A. McCammon; Ute Mann; Gregor Markl Abstract Freudenbergite (Na 2 Fe 2 3+ Ti 6 O 16 ) occurs in peralkaline alkali syenite dikes at Katzenbuckel, southwestern Germany, in association with lorenzenite, pyrochlore, landauite and Na–Zr silicates as rare, late...
FIGURES
First thumbnail for: OCCURRENCE OF LOW-Ti AND HIGH-Ti FREUDENBERGITE IN...
Second thumbnail for: OCCURRENCE OF LOW-Ti AND HIGH-Ti FREUDENBERGITE IN...
Third thumbnail for: OCCURRENCE OF LOW-Ti AND HIGH-Ti FREUDENBERGITE IN...
Image
Published: 01 December 2002
TABLE 5. REPRESENTATIVE RESULTS OF ELECTRON-MICROPROBE ANALYSES OF LORENZENITE AND LANDAUITE, KATZENBUCKEL VOLCANO, SOUTHWESTERN GERMANY
Image
Small tabular crystals of “high-titanium” freudenbergite (Fr) in coexistence with bright, anhedral grains of landauite (Lan). The BSE image is from alkali syenite dike Kb 59b. Sanidine (Sa) and coarser grains of aegirine (Ae) are present in the surroundings.
Published: 01 December 2002
F ig . 7. Small tabular crystals of “high-titanium” freudenbergite (Fr) in coexistence with bright, anhedral grains of landauite (Lan). The BSE image is from alkali syenite dike Kb 59b. Sanidine (Sa) and coarser grains of aegirine (Ae) are present in the surroundings.
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...
FIGURES
First thumbnail for: Almeidaite, Pb(Mn,Y)Zn 2 (Ti,Fe 3+ ) 18 O 36 (O,OH...
Second thumbnail for: Almeidaite, Pb(Mn,Y)Zn 2 (Ti,Fe 3+ ) 18 O 36 (O,OH...
Third thumbnail for: Almeidaite, Pb(Mn,Y)Zn 2 (Ti,Fe 3+ ) 18 O 36 (O,OH...
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...
FIGURES
First thumbnail for: Sr-Na-REE titanates of the crichtonite group from ...
Second thumbnail for: Sr-Na-REE titanates of the crichtonite group from ...
Third thumbnail for: Sr-Na-REE titanates of the crichtonite group from ...
Journal Article
Published: 01 June 1983
American Mineralogist (1983) 68 (5-6): 494–505.
... of the AM 21 O 38 series, characterized by predominant A-specific, large cations (Sr = crichtonite; Na = landauite; Pb = senaite; Ca = loveringite, and U + REE = davidite), and by M-formula small cations which are dominantly Ti, Cr, Fe, Mg, Zr, and Nb. Approximately 70% of the A-site is filled by either Ba...
Journal Article
Published: 01 October 1979
American Mineralogist (1979) 64 (9-10): 1010–1017.
..., mainly titanium and iron, occupy a tetrahedral site, M(2), and three other octahedral sites, M(3), M(4), and M(5). A comparison is made of the site occupancies and average metal-oxygen bond lengths for five crichtonite-group minerals—senaite, crichtonite, davidite, loveringite, and landauite. A linear...
Journal Article
Published: 01 November 2005
European Journal of Mineralogy (2005) 17 (6): 933–942.
... et al. , 1997 ), landauite ( Grey & Gatehouse, 1978 ), gramaccioliite-(Y) ( Orlandi et al. , 2004 ) and the new mineral cleusonite ( Table 1 ). Crichtonites are characterised by a common structural formula: XII_ A VI B VI C 18 IV T 2 (ϕ) 38 ( Armbruster & Kunz, 1990 ; Orlandi et al...
FIGURES
First thumbnail for: Cleusonite, (Pb,Sr) (U 4+ , U 6+ ) (Fe 2+ , Zn) 2 ...
Second thumbnail for: Cleusonite, (Pb,Sr) (U 4+ , U 6+ ) (Fe 2+ , Zn) 2 ...
Third thumbnail for: Cleusonite, (Pb,Sr) (U 4+ , U 6+ ) (Fe 2+ , Zn) 2 ...
Journal Article
Published: 01 January 2004
European Journal of Mineralogy (2004) 16 (1): 171–175.
.... , 1976 ), senaite ( Grey & Lloyd, 1976 ), loveringite ( Gatehouse et al. , 1978 ), landauite ( Grey & Gatehouse, 1978 ), davidite-(La) ( Gatehouse et al. , 1979 ), mathiasite ( Gatehouse et al. , 1983 ; Lu & Peng, 1987 ; Zhang et al. , 1988 ), lindsleyite ( Zhang et al. , 1988 ), U...
FIGURES
First thumbnail for: Gramaccioliite-(Y), a new mineral of the crichtoni...
Journal Article
Published: 01 October 2012
European Journal of Mineralogy (2012) 24 (6): 1061–1067.
... Zr 0.67 Ca 0.29 (V,Nb,Al) 0.36 ] ∑2l.0 O 38 . Acta Cryst. , C39 , 421 – 422 . Grey I.E. Gatehouse B.M. ( 1978 ): The crystal structure of landauite, NaMnZn 2 (Ti,Fe) 6 Ti 12 O 38 . Can. Mineral. , 16 , 63 – 68 . Grey I.E. Lloyd D.J. ( 1976 ): Crystal structure...
FIGURES
First thumbnail for: Paseroite, PbMn 2+ (Mn 2+ ,Fe 2+ ) 2 (V 5+ ,Ti,Fe ...
Second thumbnail for: Paseroite, PbMn 2+ (Mn 2+ ,Fe 2+ ) 2 (V 5+ ,Ti,Fe ...
Third thumbnail for: Paseroite, PbMn 2+ (Mn 2+ ,Fe 2+ ) 2 (V 5+ ,Ti,Fe ...
Journal Article
Published: 01 May 2017
European Journal of Mineralogy (2017) 29 (2): 331–338.
... structure of landauite, NaMnZn 2 (Ti,Fe) 6 Ti 12 O 38 . Can. Mineral. , 16 , 63 – 68 . Grey I.E. Lloyd D.J. ( 1976 ): The crystal structure of senaite . Acta Crystallogr. B , 32 , 1509 – 1513 . Grey I.E. Lloyd D.J. White J.S. ( 1976...
Journal Article
Published: 01 June 2014
European Journal of Mineralogy (2014) 26 (3): 427–437.
...) Landauite 2.822 2.211 1.963 1.997 1.973 1.969 Grey & Gatehouse (1978) Lindsleyite 2.837 2.119 1.948 1.982 1.990 1.978 Zhang et al . (1988) Loveringite 2.789 2.166 1.994 1.983 1.971 1.970 Gatehouse et al . (1978) Mapiquiroite BdV 2.818 2.186 1.919 2.000...
FIGURES
First thumbnail for: Mapiquiroite, (Sr,Pb)(U,Y)Fe 2 (Ti,Fe 3+ ) 18 O 38...
Second thumbnail for: Mapiquiroite, (Sr,Pb)(U,Y)Fe 2 (Ti,Fe 3+ ) 18 O 38...
Third thumbnail for: Mapiquiroite, (Sr,Pb)(U,Y)Fe 2 (Ti,Fe 3+ ) 18 O 38...
Journal Article
Published: 01 October 2006
Mineralogical Magazine (2006) 70 (5): 565–578.
..., 4OH Franklinite Spinel ZnFe 2 3+ O 4 4 4O X X 4 Landauite Crichtonite Na[MnZn 2 (Ti,Fe) 6 Ti 12 ]O 38 4 4O 1.964 16 Murataite (Y,Na) 6 (Zn,Fe 3+ ) 5 (Ti,Nb) 12 (O,□) 29 (O,F) 10 F4 5 5O 2.04 Fe 3+ , Ti 17 4 4O 1.977 Si Smithsonite...
FIGURES
First thumbnail for: Crystal-structure refinement of a Zn-rich kupletsk...
Second thumbnail for: Crystal-structure refinement of a Zn-rich kupletsk...
Third thumbnail for: Crystal-structure refinement of a Zn-rich kupletsk...
Journal Article
Published: 01 March 2025
Russ. Geol. Geophys. (2025) 66 (3): 299–315.
..., including new and rare ones, such as burpalite (Na 2 CaZrSi 2 O 7 F 2 ), landauite (NaMnZn 2 (Ti,Fe) 6 Ti 12 O 38 ), låvenite (Na,Ca) 2 (Mn,Fe 2+ )(Zr,Ti,Nb)Si 2 O 7 (O,OH,F), seidozerite-(Ca) (Ca 8 (Zr,Ti,Mn) 8 (Si 2 O 7 ) 4 (O,F,OH) 8 ), perrierite-(Sr) (Sr 4 Fe 2+ (Ti,Al,Nb,Fe) 4 [Si 2 O 7 ] 2 O 8 ), etc...
FIGURES
First thumbnail for: COMPOSITION OF MAFIC ROCK-FORMING MINERALS IN THE ...
Second thumbnail for: COMPOSITION OF MAFIC ROCK-FORMING MINERALS IN THE ...
Third thumbnail for: COMPOSITION OF MAFIC ROCK-FORMING MINERALS IN THE ...
Journal Article
Published: 01 June 2010
European Journal of Mineralogy (2010) 22 (3): 443–452.
... of this group so far defined are cleusonite, crichtonite, davidite-(La), davidite-(Y), davidite-(Ce), dessauite-(Y), gramaccioliite-(Y), landauite, lindsleyite, loveringite, mathiasite, and senaite (Table 1 ; cf. Wülser et al ., 2005 ). Table 1. Main cations on the M0 (=A) and M1 (=B) structural...
FIGURES
First thumbnail for: Gramaccioliite-(Y): paragenesis chemistry, and str...
Second thumbnail for: Gramaccioliite-(Y): paragenesis chemistry, and str...
Third thumbnail for: Gramaccioliite-(Y): paragenesis chemistry, and str...
Journal Article
Published: 01 April 2007
American Mineralogist (2007) 92 (4): 703–707.
...)(Ca,Zr,Mn)(Ti,Fe) 18 Fe 2 O 38 ; (Na,Sr,K,REE)(Zr,Ca,Mn)(Ti,Fe) 18 Fe 2 O 38 . Formulae 1 and 2 correspond to potentially new Ca- or Zr-dominant variants of crichtonite, whereas 3 and 4 correspond to potentially new Ca- or Zr-dominant variants of landauite. D. Pinto, T. Balić...
Journal Article
Published: 01 August 2004
The Canadian Mineralogist (2004) 42 (4): 1169–1178.
... is also present as H 2 O-free minerals such as willemite, genthelvite, landauite, murataite, nordite and osumillite. Subsolidus, low-temperature autohydration processes result in sequestration of Zn in clay minerals, zeolites and labuntsovite-group minerals. These observations are at variance...
FIGURES
First thumbnail for: ECANDREWSITE – ZINCIAN PYROPHANITE FROM LUJAVRITE,...
Second thumbnail for: ECANDREWSITE – ZINCIAN PYROPHANITE FROM LUJAVRITE,...
Third thumbnail for: ECANDREWSITE – ZINCIAN PYROPHANITE FROM LUJAVRITE,...
Journal Article
Published: 10 February 2023
Mineralogical Magazine (2023) 87 (3): 433–442.
.... and Gatehouse B.M. ( 1978 ) The crystal structure of landauite, Na[MnZn 2 (Ti,Fe) 6 Ti 12 )]O 38 . The Canadian Mineralogist , 16 , 63 – 68 . Grey I.E...
FIGURES
First thumbnail for: Botuobinskite and mirnyite, two new minerals of th...
Second thumbnail for: Botuobinskite and mirnyite, two new minerals of th...
Third thumbnail for: Botuobinskite and mirnyite, two new minerals of th...
Journal Article
Published: 01 May 2016
Russ. Geol. Geophys. (2016) 57 (5): 698–712.
..., lavenite, Ti-lavenite, wöhlerite, burpalite, seidozerite, Ca-seidozerite, rosenbuschite, vlasovite, catapleite, Ca-catapleite), Ti-minerals (titanite, astrophyllite, ramsayite, loparite, metaloparite, rinkolite, Mn-neptunite, bafertisite, chevkinite, Mn-ilmenite, pyrophanite, Sr-perrierite, landauite...
FIGURES
First thumbnail for: Genesis and crystallization of ultramafic alkaline...
Second thumbnail for: Genesis and crystallization of ultramafic alkaline...
Third thumbnail for: Genesis and crystallization of ultramafic alkaline...