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magnesioastrophyllite

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Journal Article
Published: 01 February 2017
Mineralogical Magazine (2017) 81 (1): 175–181.
... previously under the following names: monoclinic astrophyllite, magnesium astrophyllite, magnesiumastrophyllite and magnesioastrophyllite but has never been formally proposed and approved as a valid mineral species by the Commission on new Minerals, Nomenclature and Classification of the International...
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Journal Article
Published: 01 August 2012
Mineralogical Magazine (2012) 76 (4): 863–882.
..., nalivkinite, tarbagataite, kupletskite, niobokupletskite and kupletskite-(Cs); the type-2 structure occurs in magnesioastrophyllite, sveinbergeite and devitoite. The general formulae for the eight astrophyllite-group minerals (astrophyllite, niobophyllite, nalivkinite, tarbagataite, kupletskite...
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Linkage of astrophyllite ribbons and M polyhedra of the O sheet in ( a ) as...
Published: 01 August 2012
F ig . 7. Linkage of astrophyllite ribbons and M polyhedra of the O sheet in ( a ) astrophyllite and ( b ) magnesioastrophyllite; specific structural fragments of the O sheet for magnesioastrophyllite are given in ( c – e ): ( c ) a convoluted ribbon of M octahedra linking to the astrophyllite
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General view of the crystal structures of ( a ) astrophyllite, ( b ) magnes...
Published: 01 August 2012
F ig . 2. General view of the crystal structures of ( a ) astrophyllite, ( b ) magnesioastrophyllite and ( c ) the position of the A and B sites with regard to the H sheet in astrophyllite. The Mn- and Fe 2+ -dominant octahedra are magenta and green. The T(=Si) tetrahedra and D(=Ti,Nb
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Articulation of the astrophyllite ribbon: ( a ) the geometry of the Si 2 O ...
Published: 01 August 2012
and ( c ) magnesioastrophyllite. In ( a ) Si atoms are shown as orange spheres; in ( b , c ) SiO 4 tetrahedra are orange; the (O–O) H and (O–O) O anion separations are shown as black double-headed arrows and dashed lines, respectively; the ∠Si–O–Si is given in red for each Si 2 O 7 group (see text).
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Details of the topology of the HOH layer in the crystal structure of magnes...
Published: 01 August 2012
F ig . 6. Details of the topology of the HOH layer in the crystal structure of magnesioastrophyllite: ( a ) the HOH layer viewed perpendicular to the plane of the layer; ( b ) linkage of the individual M(1–4) octahedra in the O sheet to the polyhedra in the H sheets; ( c ) linkage of seven M
Journal Article
Published: 01 February 2017
Mineralogical Magazine (2017) 81 (1): 143–153.
... ideal formula astrophyllite kupletskite and devitoite groups T he Nomenclature Voting proposal 15-B – “Magnesioastrophyllite” validated under the name “lobanovite”, and astrophyllite supergroup classification – has been approved by the CNMNC-IMA (in accord with Mills et al ., 2009...
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Journal Article
Published: 01 August 2015
Mineralogical Magazine (2015) 79 (4): 941–947.
..., A.A. (2015) Gajardoite, IMA 2015-040. CNMNC Newsletter No. 26, August 2015, page 947; Mineralogical Magazine , 79 , 941–947. IMA 15-A: Anatacamite (discredited) Proposal 15-A is accepted, and anatacamite is officially discredited. IMA 15-B: Magnesioastrophyllite and astrophyllite...
Journal Article
Published: 01 January 2016
The Canadian Mineralogist (2016) 54 (1): 33–48.
... and classification of the astrophyllite-supergroup minerals were reconsidered by Sokolova et al . (2016b) . The Nomenclature Voting proposal 15-B – “Magnesioastrophyllite” validated under the name “lobanovite”, and astrophyllite supergroup classification – was approved by the CNMNC-IMA with the following two...
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Journal Article
Published: 01 July 2017
American Mineralogist (2017) 102 (7): 1565–1571.
...) 4 is a redefined mineral of the astrophyllite group. It was first noted as magnesium astrophyllite with 6.39 wt% MgO ( Semenov 1959 ) with no other data. Later it was reported under the names monoclinic astrophyllite, magnesiumastrophyllite or magnesioastrophyllite ( Peng and Ma 1963 ; Shi et al...
Journal Article
Published: 01 November 2016
The Canadian Mineralogist (2016) 54 (6): 1539–1547.
... O 12 ) 2 O 2 (OH) 4 , a new mineral of the astrophyllite supergroup and its relation to magnesioastrophyllite . Mineralogical Magazine 81 , 175 – 181 . Sokolova, E., Cámara, F...
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Journal Article
Published: 01 October 2009
European Journal of Mineralogy (2009) 21 (5): 1073–1080.
...’, such as the new högbomite, labuntsovite, epidote and sapphirine supergroups. Table 1b. Group nomenclature for the astrophyllite group. Astrophyllite group 2 2 Reference: Piilonen et al. (2003) . Astrophyllite Magnesioastrophyllite Hydroastrophyllite Niobophyllite...
Journal Article
Published: 01 March 2019
The Canadian Mineralogist (2019) 57 (2): 201–213.
... of the astrophyllite supergroup and its relation to magnesioastrophyllite . Mineralogical Magazine 81 , 175 – 181 . Sokolova, E., Cámara, F., Hawthorne, F.C...
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Journal Article
Published: 01 February 2010
The Canadian Mineralogist (2010) 48 (1): 29–40.
...” ) site in the H layer is an octahedron in all astrophyllite-group minerals except magnesioastrophyllite ( Shi et al. 1998 ), in which it is a tetragonal pyramid (as it is in devitoite). However, in heterophyllosilicates in general, the tetragonal pyramid is relatively commonly the non-tetrahedral...
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Journal Article
Published: 01 October 2012
Mineralogical Magazine (2012) 76 (5): 1053–1080.
... i M 7 Ψ 4 D 2 Φ ap 2 {T 4 Θ 12 } 2 Φ t 0–2 Astrophyllite K 2 Na Fe 7 2 + (OH) 4 Ti 2 O 2 (Si 4 O 12 ) 2 F (6) Niobophyllite K 2 Na Fe 7 2 + (OH) 4 NbTi O 2 (Si 4 O 12 ) 2 O (7) Magnesioastrophyllite K 2 Na Fe 4 2...
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Journal Article
Published: 01 February 2012
The Canadian Mineralogist (2012) 50 (1): 159–168.
... not yet been refined. The stoichiometries of the above astrophyllite-group minerals and magnesioastrophyllite, ideally K 2 Na(Fe 2+ 4 Mg 2 Na) Ti 2 (Si 4 O 12 ) 2 O 2 (OH) 4 , can be described by a general formula of the form A 2 BC 7 D 2 (T 4 O 12 ) 2 O 2 (OH) 4 X 0–1 ( Cámara et al. 2010 , modified...
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Journal Article
Published: 25 March 2021
The Canadian Mineralogist (2021) 59 (1): 107–124.
...(Fe 4 2+ Mg 2 Na)Ti 2 (Si 4 O 12 ) 2 O 2 (OH) 4 , a new mineral of the astrophyllite supergroup and its relation to magnesioastrophyllite . Mineralogical Magazine 81 , 175 – 181 . Staples, L.W., Evans, H.T., & Lindsay, J.R. (1973) Cavansite and pentagonite, new...
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Journal Article
Published: 01 April 2018
Mineralogical Magazine (2018) 82 (2): 243–255.
... +}} $ Mg 2 Na)Ti 2 (Si 4 O 12 ) 2 O 2 (OH) 4 , a new mineral of the astrophyllite supergroup and its relation to magnesioastrophyllite . Mineralogical Magazine , 81 , 175 – 181 . Stepanov , A.V. , Bekenova , G.K. , Levin , V.L. , Sokolova , E.V. , Hawthorne , F.C...
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References      Agakhanov ,  A.A.  ,   Pautov ,  L.A.  ,   Sokolova ,  E.  ...
Published: 01 April 2018
. , Cámara , F. , Hawthorne , F.C. , Semenov , E.I. and Ciriotti , M.E. ( 2017 b ) Lobanovite, K 2 Na( ${\rm Fe}_{\rm 4}^{{\rm 2 +}} $ Mg 2 Na)Ti 2 (Si 4 O 12 ) 2 O 2 (OH) 4 , a new mineral of the astrophyllite supergroup and its relation to magnesioastrophyllite . Mineralogical
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References      Agakhanov ,  A.A.  ,   Pautov ,  L.A.  ,   Sokolova ,  E.  ...
Published: 01 April 2018
. , Cámara , F. , Hawthorne , F.C. , Semenov , E.I. and Ciriotti , M.E. ( 2017 b ) Lobanovite, K 2 Na( ${\rm Fe}_{\rm 4}^{{\rm 2 +}} $ Mg 2 Na)Ti 2 (Si 4 O 12 ) 2 O 2 (OH) 4 , a new mineral of the astrophyllite supergroup and its relation to magnesioastrophyllite . Mineralogical