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homeotypes

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Journal Article
Published: 01 December 2014
Mineralogical Magazine (2014) 78 (7): 1775–1793.
... is an (Ag,Sb)-rich homeotype of dufrénoysite, stabilized by the complete coupled substitution 2 Pb 2+ = Ag + + Sb 3+ on a specific site of the crystal structure. Together with barikaite, it belongs to the rathite sub-group of P 2 1 / c homeotypes of dufrénoysite, of which the crystal chemistry is discussed...
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Journal Article
Published: 01 February 2012
American Mineralogist (2012) 97 (2-3): 440–446.
... gave the chemical formula Ag 1.95 Cu 0.01 Pb 4.81 Mn 3.20 Fe 0.02 Zn 0.01 Sb 6.09 As 3.94 Bi 0.01 S 23.95 Se 0.01 , on the basis of 44 atoms and according to the structure refinement results. Menchettiite can be classified among the Sb-rich members of the lillianite homeotypic series, which...
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Journal Article
Published: 01 September 2020
Mineralogical Magazine (2020) 84 (5): 766–777.
... > 4σ( F o ), respectively. Derbylite and graeserite are homeotypic. They share the same tunnel structure, characterised by an octahedral framework and cuboctahedral cavities, hosting (As/Sb)O 3 groups and (Ba/Pb) atoms. * Author for correspondence: Cristian Biagioni, Email...
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Journal Article
Published: 02 March 2020
Mineralogical Magazine (2020) 84 (2): 275–282.
... the occurrence of Al. Coquimbite has a homeotypic relationship with paracoquimbite, Fe 4 (SO 4 ) 6 (H 2 O) 12 ⋅6H 2 O; both mineral species belong to the coquimbite group. On the contrary, aluminocoquimbite, Al 2 Fe 2 (SO 4 ) 6 (H 2 O) 12 ⋅6H 2 O, has a different topology and does not belong to that group...
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Journal Article
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 1055–1065.
... 461 reflections with F o > 4σ( F o ) and 265 refined parameters. Parapierrotite belongs to the pierrotite–parapierrotite homeotypic pair. The refinement of the crystal structure of this Pb-bearing variety allowed the description of the mechanism favouring the hosting of Pb in one of the two (010...
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Journal Article
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 1079–1097.
.... The strongest five lines in the (calculated) powder-diffraction pattern are [ d in Å(I)( h , k , l )]: 3.781(85)( 2 ¯ ,0,10), 3.668(100)( 1 ¯ ,0,33), 3.553(83)(1,0,35), 3.009(91)( 1 ¯ ,2,27) and 2.938(94)(1, 2 ¯ ,29). Argentoliveingite is a homeotype of liveingite and a new member of the sartorite homologous...
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Journal Article
Published: 01 March 2019
American Mineralogist (2019) 104 (3): 459–462.
... homologs from the kobellite homologous series, a group of “chessboard derivative structures,” represented by Bi-, and Sb-rich pairs of natural phases (the kobellite-tintinaite isotypic series and giessenite-izoklakeite homeotypic series), we visualize the slabs underpinning crystal structural modularity...
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Journal Article
Published: 01 November 2018
European Journal of Mineralogy (2018) 30 (6): 1155–1162.
... fully occupied Pb sites, two fully occupied As sites, one Sb site and five mixed (As,Sb) sites. In projection parallel to the 8.5 Å axis, the crystal structure is a typical member of the sartorite homologous series, a sartorite homologue N = 3;3, and homeotype of twinnite and guettardite. Opposing...
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Journal Article
Published: 01 August 2017
European Journal of Mineralogy (2017) 29 (4): 713–726.
...), c = 23.501 (8) Å, α = 89.91 (1), β = 102.93 (1), γ = 89.88 (1), V = 4553 (2) Å 3 , Z = 3. The crystal structure has been solved and refined to R 1 = 0.088 on the basis of 7317 reflections with F o >4σ ( F o ). Bernarlottiite is a new N = 3.5 homeotype of the sartorite homologous series, with a 3...
Journal Article
Published: 01 February 2017
Mineralogical Magazine (2017) 81 (1): 47–60.
...Cristian Biagioni; Yves Moëlo Abstract Boscardinite, ideally TlPb 4 (Sb 7 As 2 ) Σ9 S 18 , has been described recently as a new homeotypic derivative of baumhauerite, found at Monte Arsiccio mine, Apuan Alps, Tuscany, Italy. New findings of boscardinite in different mineral associations...
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Journal Article
Published: 01 June 2016
Mineralogical Magazine (2016) 80 (4): 675–690.
... of unequal lengths (short and long arms, respectively). Two different kinds of short arms occur in meerschautite. One is an Ag-rich arm, whereas the other shows localized Sb–O–Sb bonds. Meerschautite is an expanded derivative of owyheeite and has quasi-homeotypic relationships with sterryite...
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Journal Article
Published: 01 December 2013
European Journal of Mineralogy (2013) 25 (6): 1005–1016.
... is the Cl-free homeotype of dadsonite, Pb 23 Sb 25 S 60 Cl, stabilized by the disulfide ion (S 2 ) 2− , and related by the coupled substitution Pb 2+ + Cl − → Sb 3+ + (S 2 ) 2− . Its formation is dependent upon a high value of f (S 2 ), like other associated minerals at Seravezza (native sulfur, enargite...
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Journal Article
Published: 01 October 2013
Mineralogical Magazine (2013) 77 (7): 3039–3046.
...), 3.408(62)(2İ14), 2.972(66)(2İ16), 2.769(91)(222), 2.752(78)(4İ24) and 2.133(54)(402). Barikaite is the N = 4 member of the sartorite homologous series with a near-equal role of As and Sb, which have an ordered distribution pattern in the structure. It is a close homeotype of rathite and more distantly...
FIGURES
Journal Article
Published: 01 August 2013
The Canadian Mineralogist (2013) 51 (4): 569–596.
... be considered more simply as homeotypes of body-centered cubic Fe (or CsCl) or, alternatively, as complex derivatives of cation-deficient perovskite-related structures. Both minerals are late-stage products, possibly related to the in situ alteration of the pre-existing mineral assemblage (dawsonite, burbankite...
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Journal Article
Published: 01 June 2013
The Canadian Mineralogist (2013) 51 (3): 475–494.
... of protochabournéite appears as the main factor precluding the 2 a × 2 c superstructure visible in chabournéite as well as in dalnegroite. Protochabournéite, like dalnegroite, belongs to the chabournéite homeotypic series. protochabournéite new mineral species sulfosalt thallium lead antimony arsenic crystal...
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Journal Article
Published: 01 April 2012
The Canadian Mineralogist (2012) 50 (2): 235–251.
...), and 2.176 (ms). Boscardinite is the Tl–Sb homeotype of baumhauerite; its crystal structure has been solved by X-ray single-crystal study on the basis of 4319 observed reflections with a final R 1 = 0.045. It can be described in the sartorite homologous series as formed by the 1:1 alternation of sartorite...
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Journal Article
Published: 01 May 2011
American Mineralogist (2011) 96 (5-6): 878–887.
... be described as an order-disorder (OD) structure, built up by two different kinds of layers. Taking into account only the short (As,Sb)-S bonds, (As,Sb)S 3 triangular pyramids form double chains similar to those described in other natural and synthetic compounds, among which its homeotype gillulyite, as well...
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Journal Article
Published: 01 August 2010
European Journal of Mineralogy (2010) 22 (4): 595–604.
... with PO 4 tetrahedra, with Pb atoms and H 2 O molecules occupying voids in the framework. Pb 3 Fe 2 (PO 4 ) 4 (H 2 O) is homeotypic with synthetic Pb 3 Cr 2 (PO 4 ) 4 ; both compounds share the same heteropolyhedral topology and the same space group, but only Pb 3 Fe 2 (PO 4 ) 4 (H 2 O) contains...
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Journal Article
Published: 01 February 2010
The Canadian Mineralogist (2010) 48 (1): 139–144.
....%. Angelaite is orthorhombic, with a 12.734(5), b 4.032(1), c 14.633(5) Å, V 751.8(5) Å 3 , space group Pnma and Z = 4. The calculated density is 6.934 g/cm 3 . It is a homeotype of galenobismutite, with Cu and Ag replacing one of the Bi positions in a complicated way. The strongest eight lines...
FIGURES
Journal Article
Published: 01 February 2010
The Canadian Mineralogist (2010) 48 (1): 145–153.
... a capped trigonal prismatic Pb site, a quasi-octahedral Bi site, a linearly coordinated Cu site, and three triangular sites, one occupied by Ag and two partially occupied by Cu. Angelaite is a homeotype of galenobismutite with the Pb and Bi1 sites of galenobismutite preserved, and the Bi2 site replaced...
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