Zincalstibite-9R: The first nine-layer polytype with the layered double hydroxide structure-type

S. J. Mills; A. G. Christy; A. R. Kampf; R. M. Housley; G. Favreau; J. C. Boulliard; V. Bourgoin

doi:10.1180/minmag.2012.076.5.01

Zincalstibite-9R: The first nine-layer polytype with the layered double hydroxide structure-type

S. J. Mills^*, A. G. Christy, A. R. Kampf, R. M. Housley, G. Favreau, J. C. Boulliard, V. Bourgoin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

Zincalstibite-9R, a new polytype in the hydrotalcite supergroup is reported from the Monte Avanza mine, Italy. It occurs as pale blue curved disc-like tablets flattened on {001} intergrown to form rosettes typically less than 50 μm in diameter, with cyanophyllite and linarite in cavities in baryte. Zincalstibite-9R is uniaxial (-), with refractive indices ω = 1.647(2) and &epsi; = 1.626(2) measured in white light. The empirical formula (based on 12 OH groups) is (Zn²⁺ _1.09Cu²⁺ _0.87Al_0.04)_Σ2.00Al_1.01(Sb ⁵⁺ _0.97Si_0.02)_Σ0.99(OH) ₁₂, and the ideal formula is (Zn,Cu)₂Al(OH) ₆[Sb(OH)₆]. Zincalstibite-9R crystallizes in space group R3, witha = 5.340(2),c = 88.01(2) Å,V = 2173.70(15) Å³ and Z = 9. The crystal structure was refined to R ₁ = 0.0931 for 370 unique reflections [F _o > 4σ(F)] and R ₁ = 0.0944 for all 381 unique reflections. It has the longest periodic layer stacking sequence for a layered double hydroxide compound reported to date.

Original language	English
Pages (from-to)	1337-1345
Number of pages	9
Journal	Mineralogical Magazine
Volume	76
Issue number	5
DOIs	https://doi.org/10.1180/minmag.2012.076.5.01
Publication status	Published - 2012

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10.1180/minmag.2012.076.5.01

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@article{748759113a8a43c1ac183b09f7f2b679,

title = "Zincalstibite-9R: The first nine-layer polytype with the layered double hydroxide structure-type",

abstract = "Zincalstibite-9R, a new polytype in the hydrotalcite supergroup is reported from the Monte Avanza mine, Italy. It occurs as pale blue curved disc-like tablets flattened on {001} intergrown to form rosettes typically less than 50 μm in diameter, with cyanophyllite and linarite in cavities in baryte. Zincalstibite-9R is uniaxial (-), with refractive indices ω = 1.647(2) and &epsi; = 1.626(2) measured in white light. The empirical formula (based on 12 OH groups) is (Zn2+ 1.09Cu2+ 0.87Al0.04)Σ2.00Al1.01(Sb 5+ 0.97Si0.02)Σ0.99(OH) 12, and the ideal formula is (Zn,Cu)2Al(OH) 6[Sb(OH)6]. Zincalstibite-9R crystallizes in space group R3, witha = 5.340(2),c = 88.01(2) {\AA},V = 2173.70(15) {\AA}3 and Z = 9. The crystal structure was refined to R 1 = 0.0931 for 370 unique reflections [F o > 4σ(F)] and R 1 = 0.0944 for all 381 unique reflections. It has the longest periodic layer stacking sequence for a layered double hydroxide compound reported to date.",

keywords = "LDH, Monte Avanza, crystal structure, cualstibite, hydrotalcite, layered double hydroxide, polytype, zincalstibite",

author = "Mills, {S. J.} and Christy, {A. G.} and Kampf, {A. R.} and Housley, {R. M.} and G. Favreau and Boulliard, {J. C.} and V. Bourgoin",

year = "2012",

doi = "10.1180/minmag.2012.076.5.01",

language = "English",

volume = "76",

pages = "1337--1345",

journal = "Mineralogical Magazine",

issn = "0026-461X",

publisher = "Mineralogical Society",

number = "5",

}

TY - JOUR

T1 - Zincalstibite-9R

T2 - The first nine-layer polytype with the layered double hydroxide structure-type

AU - Mills, S. J.

AU - Christy, A. G.

AU - Kampf, A. R.

AU - Housley, R. M.

AU - Favreau, G.

AU - Boulliard, J. C.

AU - Bourgoin, V.

PY - 2012

Y1 - 2012

N2 - Zincalstibite-9R, a new polytype in the hydrotalcite supergroup is reported from the Monte Avanza mine, Italy. It occurs as pale blue curved disc-like tablets flattened on {001} intergrown to form rosettes typically less than 50 μm in diameter, with cyanophyllite and linarite in cavities in baryte. Zincalstibite-9R is uniaxial (-), with refractive indices ω = 1.647(2) and &epsi; = 1.626(2) measured in white light. The empirical formula (based on 12 OH groups) is (Zn2+ 1.09Cu2+ 0.87Al0.04)Σ2.00Al1.01(Sb 5+ 0.97Si0.02)Σ0.99(OH) 12, and the ideal formula is (Zn,Cu)2Al(OH) 6[Sb(OH)6]. Zincalstibite-9R crystallizes in space group R3, witha = 5.340(2),c = 88.01(2) Å,V = 2173.70(15) Å3 and Z = 9. The crystal structure was refined to R 1 = 0.0931 for 370 unique reflections [F o > 4σ(F)] and R 1 = 0.0944 for all 381 unique reflections. It has the longest periodic layer stacking sequence for a layered double hydroxide compound reported to date.

AB - Zincalstibite-9R, a new polytype in the hydrotalcite supergroup is reported from the Monte Avanza mine, Italy. It occurs as pale blue curved disc-like tablets flattened on {001} intergrown to form rosettes typically less than 50 μm in diameter, with cyanophyllite and linarite in cavities in baryte. Zincalstibite-9R is uniaxial (-), with refractive indices ω = 1.647(2) and &epsi; = 1.626(2) measured in white light. The empirical formula (based on 12 OH groups) is (Zn2+ 1.09Cu2+ 0.87Al0.04)Σ2.00Al1.01(Sb 5+ 0.97Si0.02)Σ0.99(OH) 12, and the ideal formula is (Zn,Cu)2Al(OH) 6[Sb(OH)6]. Zincalstibite-9R crystallizes in space group R3, witha = 5.340(2),c = 88.01(2) Å,V = 2173.70(15) Å3 and Z = 9. The crystal structure was refined to R 1 = 0.0931 for 370 unique reflections [F o > 4σ(F)] and R 1 = 0.0944 for all 381 unique reflections. It has the longest periodic layer stacking sequence for a layered double hydroxide compound reported to date.

KW - LDH

KW - Monte Avanza

KW - crystal structure

KW - cualstibite

KW - hydrotalcite

KW - layered double hydroxide

KW - polytype

KW - zincalstibite

UR - http://www.scopus.com/inward/record.url?scp=84869185753&partnerID=8YFLogxK

U2 - 10.1180/minmag.2012.076.5.01

DO - 10.1180/minmag.2012.076.5.01

M3 - Article

SN - 0026-461X

VL - 76

SP - 1337

EP - 1345

JO - Mineralogical Magazine

JF - Mineralogical Magazine

IS - 5

ER -

Zincalstibite-9R: The first nine-layer polytype with the layered double hydroxide structure-type

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