Kristjánite, KNa2H(SO4)2, a new fumarolic mineral from Iceland containing [SO4-H-SO4]3-anion in the crystal structure
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Kristjánite, KNa2H(SO4)2, a new fumarolic mineral from Iceland containing [SO4-H-SO4]3-anion in the crystal structure. / Balić-Žunić, Tonči; Nestola, Fabrizio; Pamato, Martha G.; Rasmussen, Maja B.
In: Mineralogical Magazine, 2024.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Kristjánite, KNa2H(SO4)2, a new fumarolic mineral from Iceland containing [SO4-H-SO4]3-anion in the crystal structure
AU - Balić-Žunić, Tonči
AU - Nestola, Fabrizio
AU - Pamato, Martha G.
AU - Rasmussen, Maja B.
N1 - Publisher Copyright: © 2024 Cambridge University Press. All rights reserved.
PY - 2024
Y1 - 2024
N2 - Kristjánite, KNa2H(SO4)2, is a new mineral found in a high-temperature fumarole on Fimmvör∂uháls, Iceland. It is monoclinic, P21/n, a, b, c (Å) = 6.9625(1), 9.9953(1), 11.0928(2), β = 105.637(2)°, V = 743.40(2) Å3. Kristjánite forms colourless transparent crystals up to about 100 μm in size in compact aggregates with metathénardite, belomarinaite, aphthitalite, ivsite and an unknown mineral with tentative composition K2NaH(SO4)2, or grows in white globules of smaller grains on their surface. The eight strongest maxima in a Powder X-Ray Diffraction diagram are [d(Å)Intensity] 4.376, 3.653, 3.488, 3.3610, 3.188, 2.834, 2.734and 2.4052. The mineral represents a novel crystal structure type. In it, K is coordinated by eight O atoms, and two symmetrically independent Na atoms by seven O atoms. Two symmetrically independent S atoms are in tetrahedral coordination by O atoms. A close to linear, very short hydrogen bond (2.44 Å), connects the two to a SO4-H-SO4dimer. K and Na coordination polyhedra share vertices, edges and even faces forming with sulphate tetrahedra a tight structure with narrow [100] channels lined on two opposite sides by hydrogen bonds.
AB - Kristjánite, KNa2H(SO4)2, is a new mineral found in a high-temperature fumarole on Fimmvör∂uháls, Iceland. It is monoclinic, P21/n, a, b, c (Å) = 6.9625(1), 9.9953(1), 11.0928(2), β = 105.637(2)°, V = 743.40(2) Å3. Kristjánite forms colourless transparent crystals up to about 100 μm in size in compact aggregates with metathénardite, belomarinaite, aphthitalite, ivsite and an unknown mineral with tentative composition K2NaH(SO4)2, or grows in white globules of smaller grains on their surface. The eight strongest maxima in a Powder X-Ray Diffraction diagram are [d(Å)Intensity] 4.376, 3.653, 3.488, 3.3610, 3.188, 2.834, 2.734and 2.4052. The mineral represents a novel crystal structure type. In it, K is coordinated by eight O atoms, and two symmetrically independent Na atoms by seven O atoms. Two symmetrically independent S atoms are in tetrahedral coordination by O atoms. A close to linear, very short hydrogen bond (2.44 Å), connects the two to a SO4-H-SO4dimer. K and Na coordination polyhedra share vertices, edges and even faces forming with sulphate tetrahedra a tight structure with narrow [100] channels lined on two opposite sides by hydrogen bonds.
KW - Icelandic fumarole
KW - KNaH(SO)
KW - kristjánite
KW - new mineral
KW - SO-H-SOdimmer
U2 - 10.1180/mgm.2024.4
DO - 10.1180/mgm.2024.4
M3 - Journal article
AN - SCOPUS:85186587412
JO - Mineralogical Magazine
JF - Mineralogical Magazine
SN - 0026-461X
ER -
ID: 390406845