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clinokurchatovite

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Journal Article

Modular aspects of the crystal structures of kurchatovite and clinokurchatovite Available to Purchase

Athos CALLEGARI, Fiorenzo MAZZI, Carla TADINI
Published: 01 March 2003
European Journal of Mineralogy (2003) 15 (2): 277–282.
DOI: https://doi.org/10.1127/0935-1221/2003/0015-0277
...Athos CALLEGARI; Fiorenzo MAZZI; Carla TADINI Abstract The crystal structures of the two polytypes of the compound CaMgB 2 O 5 , kurchatovite and clinokurchatovite, were determined in the space groups Pc2 1 b and P2 1 /c respectively by Yakubovich et al. (1976) and Simonov et al. (1980...
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Projection along [010] of the unit cell of clinokurchatovite and of half (a/2) cell of kurchatovite. The two structures coincide until xmon = 0.75 and xorth = 0.25, where the b-glide plane takes place in the orthorhombic cell. The empty B-triangles refer to the range (0.75 &lt;xmon &lt; 1) of the cell of clinokurchatovite, whereas all the remaining B-triangles belong to kurchatovite. For sake of clarity the sites of Ca and Mg have been omitted. The projection is 3° rotated along a* to reduce the overlapping of B-triangles.

Projection along [010] of the unit cell of clinokurchatovite and of half ( ... Available to Purchase

Published: 01 March 2003
Fig. 3. Projection along [010] of the unit cell of clinokurchatovite and of half ( a/2 ) cell of kurchatovite. The two structures coincide until x mon = 0.75 and x orth = 0.25, where the b -glide plane takes place in the orthorhombic cell. The empty B-triangles refer to the range (0.75 <x
Journal Article

SZAIBÉLYITE: CRYSTAL-STRUCTURE ANALYSIS AND HYDROGEN BONDING Available to Purchase

Joel D. Grice
Published: 01 June 2008
The Canadian Mineralogist (2008) 46 (3): 671–677.
DOI: https://doi.org/10.3749/canmin.46.3.671
... borates, such as suanite and clinokurchatovite. Abstract La szaibélyite, de composition idéale MgBO 2 (OH), est présente dans le membre Halite Supérieure des évaporites du groupe de Windsor à la mine exploitée par la Potash Corporation of Saskatchewan (division du Nouveau-Brunswick) à Penobsquis...
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View PDF for article title, SZAIBÉLYITE: CRYSTAL-STRUCTURE ANALYSIS AND HYDROGEN BONDING
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Bond lengths (Å) and selected bond angles (°) in clinokurchatovite and kur... Available to Purchase

Published: 01 March 2003
Table 3. Bond lengths (Å) and selected bond angles (°) in clinokurchatovite and kurchatovite.
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Unit-cell, data collection, and selected refinement parameters for clinokur... Available to Purchase

Published: 01 March 2003
Table 1. Unit-cell, data collection, and selected refinement parameters for clinokurchatovite and kurchatovite.
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The structure of clinokurchatovite (Callegari et al. 2003), with Ca atoms in yellow; red triangles represent [BO3] polyhedra, and the [MgO6] octahedra are shown in orange.

The structure of clinokurchatovite ( Callegari et al. 2003 ), with Ca ato... Available to Purchase

Published: 01 June 2008
F ig . 4. The structure of clinokurchatovite ( Callegari et al. 2003 ), with Ca atoms in yellow; red triangles represent [BO 3 ] polyhedra, and the [MgO 6 ] octahedra are shown in orange.
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Projection along [001] of the common part (three modules) of the structure of clinokurchatovite (0 &lt;xmon &lt; 0.75) and kurchatovite (0 &lt; xorth &lt; 0.25). The octahedral coordination of Mg and the 7-coordination of Ca are drawn.

Projection along [001] of the common part (three modules) of the structure ... Available to Purchase

Published: 01 March 2003
Fig. 2. Projection along [001] of the common part (three modules) of the structure of clinokurchatovite (0 <x mon < 0.75) and kurchatovite (0 < x orth < 0.25). The octahedral coordination of Mg and the 7-coordination of Ca are drawn.
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The crystal structure of the monoclinic module which composes the structures of kurchatovite and clinokurchatovite. The two projections: (a) along [001] and (b) along [010] show the sites of calcium and magnesium as well as the two triangles with a common vertex of the borate cluster. The possible symmetries at the two (100) border planes of the module are given in the (a) projection. The (b) projection is 3° rotated along a* to reduce the overlapping of B-tri-angles.

The crystal structure of the monoclinic module which composes the structure... Available to Purchase

Published: 01 March 2003
Fig. 1. The crystal structure of the monoclinic module which composes the structures of kurchatovite and clinokurchatovite. The two projections: (a) along [001] and (b) along [010] show the sites of calcium and magnesium as well as the two triangles with a common vertex of the borate cluster
Journal Article

How many boron minerals occur in Earth's upper crust? Available to Purchase

Edward S. Grew, Grethe Hystad, Robert M. Hazen, Sergey V. Krivovichev, Liudmila A. Gorelova
Published: 01 August 2017
American Mineralogist (2017) 102 (8): 1573–1587.
DOI: https://doi.org/10.2138/am-2017-5897
... as polytypes of a single species. Thus there are two entries for veatchite in the 1978 list, but one entry in the 2017 list (Appendix 1 Table 3). It does not appear that a similar fate will befall kurchatovite and clinokurchatovite, although Belokoneva (2003) concluded that these minerals are polytypes...
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Journal Article

CNMNC guidelines for the nomenclature of polymorphs and polysomes Available to Purchase

Frédéric Hatert, Stuart J. Mills, Marco Pasero, Ritsuro Miyawaki, Ferdinando Bosi
Published: 11 April 2023
Mineralogical Magazine (2023) 87 (2): 225–232.
DOI: https://doi.org/10.1180/mgm.2023.13
..., clinojimthompsonite, clinokurchatovite, clinometaborite, clino-oscarkempffite, clinophosinaite, clinosafflorite, clino-suenoite, clinotobermorite, clinoungemachite, clinozoisite. Triclinic: anorthominasragrite. If three or more polymorphs show the same crystal system but different space groups, the space...
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Journal Article

NEW MINERALS Available to Purchase

Published: 01 October 2002
The Canadian Mineralogist (2002) 40 (5): 1529–1550.
DOI: https://doi.org/10.2113/gscanmin.40.5.1529
... and (possibly) paratacamite. Locality : The Solongo deposit, Buryatiya, Russia. Occurrence : Found in drill core in kurchatovite–sakhaite ore. Associated minerals are: calcite, fluoborite, frolovite, magnetite, kurchatovite, clinokurchatovite, fedorovskite, sakhaite, vimsite, pentahydroborite...
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New Mineral Names Available to Purchase

Glenn Poirier, T. Scott Ercit, Kimberly T. Tait, Paula C. Piilonen, Ralph Rowe
Published: 01 February 2009
American Mineralogist (2009) 94 (2-3): 399–408.
DOI: https://doi.org/10.2138/am.2009.538
... that are cross-linked by borate polyanions and H-bonding that is reflected by the (100) flattened habit and cleavage. Szaibélyite contains the fundamental building block (FBB) 2Δ: 2Δ and is isostructural with sussexite. Other borate minerals with the same FBB are kurchatovite, clinokurchatovite, and suanite...
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Journal Article

Structural and chemical complexity of minerals: an update Available to Purchase

Sergey V. Krivovichev, Vladimir G. Krivovichev, Robert M. Hazen, Sergey M. Aksenov, Margarita S. Avdontceva, Alexander M. Banaru, Liudmila A. Gorelova, Rezeda M. Ismagilova, Ilya V. Kornyakov, Ivan V. Kuporev, Shaunna M. Morrison, Taras L. Panikorovskii, Galina L. Starova
Published: 01 April 2022
Mineralogical Magazine (2022) 86 (2): 183–204.
DOI: https://doi.org/10.1180/mgm.2022.23
... complexity in the CaO–B 2 O 3 -H 2 O system European Journal of Mineralogy , 30 , 277 – 287 . Pankova Y.A. , Krivovichev S.V. , Pekov I.V. , Grew E.S. and Yapaskurt V.O. ( 2018b ) Kurchatovite and clinokurchatovite, ideally CaMgB 2 O 5 : an example of modular...
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