Wrightite, K2Al2O(AsO4)2, a new oxo-orthoarsenate from the Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik volcano, Kamchatka peninsula, Russia

Andrey P. Shablinskii, Stanislav K. Filatov, Lidyua P. Vergasova, Eugeniya Yu Avdontseva, Svetlana V. Moskaleva

Research output

1 Citation (Scopus)

Abstract

The new mineral wrightite, K2Al2O(AsO4)2, was found in 1983 at a fumarole on the Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik volcano, Kamchatka peninsula, Russia, where it occurs as light yellow aggregates of transparent tabular crystals, with an average size of 0.05 mm × 0.03 mm × 0.005 mm. Wrightite is orthorhombic, space group Pnma, with the unit-cell parameters a = 8.230(5), b = 5.555(4), c = 17.584(1) Å, V = 803.9(6) Å3 and Z = 4 (from powder data). The empirical formula is (K1.69Na0.38)Σ2.07(Al1.80Fe0.24)Σ2.04As1.96O9. The crystal structure (R1 = 0.043) consists of Al2O(AsO4)2 layers in the ab plane with clusters of edge-sharing AlO6 octahedra. Each layer contains two independent isolated AsO4 tetrahedra and two AlO6 octahedra. AlO6 octahedra are linked by edges, forming zigzag chains along the b axis inside the Al-As layer. Eight- and six-coordinated K atoms are located in the interlayer space between Al2O(AsO4)2 layers. The mineral is biaxial (-), α =1.679(2), β =1.685(2), γ (calc.) =1.687; 2V(meas.) = 62(10)° (λ = 589 nm). The strongest lines in the powder X-ray diffraction pattern [d,Å(I)(hkl)] are: 8.77(36)(002); 4.458(17)(111); 4.010(19)(201,013); 3.875(19)(104) and 2.972(100)(015). The mineral was named in honour of Adrian Carl Wright, Emeritus Professor at the University of Reading, UK.

Original languageEnglish
Pages (from-to)1243-1251
Number of pages9
JournalMineralogical Magazine
Volume82
Issue number6
DOIs
Publication statusPublished - 1 Dec 2018

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Volcanoes
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Minerals
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volcanic eruption
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Diffraction patterns
fumarole
new mineral
mineral
Crystal structure
crystal structure
Atoms
Crystals
X-ray diffraction
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Scopus subject areas

  • Geochemistry and Petrology

Cite this

@article{f2b6f48cd52c4dafab50c8b3bd81e37d,
title = "Wrightite, K2Al2O(AsO4)2, a new oxo-orthoarsenate from the Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik volcano, Kamchatka peninsula, Russia",
abstract = "The new mineral wrightite, K2Al2O(AsO4)2, was found in 1983 at a fumarole on the Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik volcano, Kamchatka peninsula, Russia, where it occurs as light yellow aggregates of transparent tabular crystals, with an average size of 0.05 mm × 0.03 mm × 0.005 mm. Wrightite is orthorhombic, space group Pnma, with the unit-cell parameters a = 8.230(5), b = 5.555(4), c = 17.584(1) {\AA}, V = 803.9(6) {\AA}3 and Z = 4 (from powder data). The empirical formula is (K1.69Na0.38)Σ2.07(Al1.80Fe0.24)Σ2.04As1.96O9. The crystal structure (R1 = 0.043) consists of Al2O(AsO4)2 layers in the ab plane with clusters of edge-sharing AlO6 octahedra. Each layer contains two independent isolated AsO4 tetrahedra and two AlO6 octahedra. AlO6 octahedra are linked by edges, forming zigzag chains along the b axis inside the Al-As layer. Eight- and six-coordinated K atoms are located in the interlayer space between Al2O(AsO4)2 layers. The mineral is biaxial (-), α =1.679(2), β =1.685(2), γ (calc.) =1.687; 2V(meas.) = 62(10)° (λ = 589 nm). The strongest lines in the powder X-ray diffraction pattern [d,{\AA}(I)(hkl)] are: 8.77(36)(002); 4.458(17)(111); 4.010(19)(201,013); 3.875(19)(104) and 2.972(100)(015). The mineral was named in honour of Adrian Carl Wright, Emeritus Professor at the University of Reading, UK.",
keywords = "crystal structure, fumarole minerals, Kamchatka peninsula, new mineral species, oxo-orthoarsenate, wrightite",
author = "Shablinskii, {Andrey P.} and Filatov, {Stanislav K.} and Vergasova, {Lidyua P.} and Avdontseva, {Eugeniya Yu} and Moskaleva, {Svetlana V.}",
year = "2018",
month = "12",
day = "1",
doi = "10.1180/minmag.2017.081.091",
language = "English",
volume = "82",
pages = "1243--1251",
journal = "Mineralogical Magazine",
issn = "0026-461X",
publisher = "Mineralogical Society",
number = "6",

}

TY - JOUR

T1 - Wrightite, K2Al2O(AsO4)2, a new oxo-orthoarsenate from the Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik volcano, Kamchatka peninsula, Russia

AU - Shablinskii, Andrey P.

AU - Filatov, Stanislav K.

AU - Vergasova, Lidyua P.

AU - Avdontseva, Eugeniya Yu

AU - Moskaleva, Svetlana V.

PY - 2018/12/1

Y1 - 2018/12/1

N2 - The new mineral wrightite, K2Al2O(AsO4)2, was found in 1983 at a fumarole on the Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik volcano, Kamchatka peninsula, Russia, where it occurs as light yellow aggregates of transparent tabular crystals, with an average size of 0.05 mm × 0.03 mm × 0.005 mm. Wrightite is orthorhombic, space group Pnma, with the unit-cell parameters a = 8.230(5), b = 5.555(4), c = 17.584(1) Å, V = 803.9(6) Å3 and Z = 4 (from powder data). The empirical formula is (K1.69Na0.38)Σ2.07(Al1.80Fe0.24)Σ2.04As1.96O9. The crystal structure (R1 = 0.043) consists of Al2O(AsO4)2 layers in the ab plane with clusters of edge-sharing AlO6 octahedra. Each layer contains two independent isolated AsO4 tetrahedra and two AlO6 octahedra. AlO6 octahedra are linked by edges, forming zigzag chains along the b axis inside the Al-As layer. Eight- and six-coordinated K atoms are located in the interlayer space between Al2O(AsO4)2 layers. The mineral is biaxial (-), α =1.679(2), β =1.685(2), γ (calc.) =1.687; 2V(meas.) = 62(10)° (λ = 589 nm). The strongest lines in the powder X-ray diffraction pattern [d,Å(I)(hkl)] are: 8.77(36)(002); 4.458(17)(111); 4.010(19)(201,013); 3.875(19)(104) and 2.972(100)(015). The mineral was named in honour of Adrian Carl Wright, Emeritus Professor at the University of Reading, UK.

AB - The new mineral wrightite, K2Al2O(AsO4)2, was found in 1983 at a fumarole on the Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik volcano, Kamchatka peninsula, Russia, where it occurs as light yellow aggregates of transparent tabular crystals, with an average size of 0.05 mm × 0.03 mm × 0.005 mm. Wrightite is orthorhombic, space group Pnma, with the unit-cell parameters a = 8.230(5), b = 5.555(4), c = 17.584(1) Å, V = 803.9(6) Å3 and Z = 4 (from powder data). The empirical formula is (K1.69Na0.38)Σ2.07(Al1.80Fe0.24)Σ2.04As1.96O9. The crystal structure (R1 = 0.043) consists of Al2O(AsO4)2 layers in the ab plane with clusters of edge-sharing AlO6 octahedra. Each layer contains two independent isolated AsO4 tetrahedra and two AlO6 octahedra. AlO6 octahedra are linked by edges, forming zigzag chains along the b axis inside the Al-As layer. Eight- and six-coordinated K atoms are located in the interlayer space between Al2O(AsO4)2 layers. The mineral is biaxial (-), α =1.679(2), β =1.685(2), γ (calc.) =1.687; 2V(meas.) = 62(10)° (λ = 589 nm). The strongest lines in the powder X-ray diffraction pattern [d,Å(I)(hkl)] are: 8.77(36)(002); 4.458(17)(111); 4.010(19)(201,013); 3.875(19)(104) and 2.972(100)(015). The mineral was named in honour of Adrian Carl Wright, Emeritus Professor at the University of Reading, UK.

KW - crystal structure

KW - fumarole minerals

KW - Kamchatka peninsula

KW - new mineral species

KW - oxo-orthoarsenate

KW - wrightite

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U2 - 10.1180/minmag.2017.081.091

DO - 10.1180/minmag.2017.081.091

M3 - Article

AN - SCOPUS:85060795126

VL - 82

SP - 1243

EP - 1251

JO - Mineralogical Magazine

JF - Mineralogical Magazine

SN - 0026-461X

IS - 6

ER -