Eldfellite, NaFe(SO4)2, a new fumarolic mineral from Eldfell volcano, Iceland

Tonci Balic Zunic; A. Garavelli; P. Acquafredda; E. Leonardsen; S.P. Jakobsson

doi:10.1180/minmag.2009.073.1.51

Eldfellite, NaFe(SO₄)₂, a new fumarolic mineral from Eldfell volcano, Iceland

Tonci Balic Zunic, A. Garavelli, P. Acquafredda, E. Leonardsen, S.P. Jakobsson

Geology

23 Citations (Scopus)

Abstract

A new mineral, eldfellite, was found among fumarolic encrustations collected in 1990 on the Eldfell volcano, Heimaey Island, Iceland. Associated minerals are ralstonite, anhydrite, gypsum, bassanite, hematite, opal and tamarugite, as well as a presumably new mineral with the composition Na₃Fe(SO₄)₃. Along with opal and tamarugite, eldfellite forms soft and fragile aggregates built of thin, platy crystals of micrometre size. The mineral is yellowish-green to greenish-white, with a white streak. The calculated density is 3.062 g/cm³. Eldfellite is monoclinic, C2/m, a 8.043(4) Å, b 5.139(2) Å, c 7.115(4) Å, ß 92.13(2)°, V_uc 293.9(2) Å³, Z = 2 and is isostructural with yavapaiite[KFe(SO₄)₂]. The strongest lines in the powder diffraction diagram are [d (Å), I (relative to 10)]: 3.72, 8; 3.64, 5; 3.43, 5; 2.77, 10; 2.72, 6; 2.57, 3; 2.370, 6; 1.650, 3. The chemical analysis and the X-ray diffraction data of eldfellite correspond to those of the synthetic compound NaFe(SO₄)₂.

Original language	English
Journal	Mineralogical Magazine
Volume	73
Issue number	1
Pages (from-to)	51-57
ISSN	0026-461X
DOIs	https://doi.org/10.1180/minmag.2009.073.1.51
Publication status	Published - 2009

Keywords

Faculty of Science
eldfellite
new mineral
fumaroles
new mineral species

Access to Document

10.1180/minmag.2009.073.1.51

Cite this

@article{c8fe5480ea3911deba73000ea68e967b,

title = "Eldfellite, NaFe(SO4)2, a new fumarolic mineral from Eldfell volcano, Iceland",

abstract = "A new mineral, eldfellite, was found among fumarolic encrustations collected in 1990 on the Eldfell volcano, Heimaey Island, Iceland. Associated minerals are ralstonite, anhydrite, gypsum, bassanite, hematite, opal and tamarugite, as well as a presumably new mineral with the composition Na3Fe(SO4)3. Along with opal and tamarugite, eldfellite forms soft and fragile aggregates built of thin, platy crystals of micrometre size. The mineral is yellowish-green to greenish-white, with a white streak. The calculated density is 3.062 g/cm3. Eldfellite is monoclinic, C2/m, a 8.043(4) {\AA}, b 5.139(2) {\AA}, c 7.115(4) {\AA}, {\ss} 92.13(2)°, Vuc 293.9(2) {\AA}3, Z = 2 and is isostructural with yavapaiite[KFe(SO4)2]. The strongest lines in the powder diffraction diagram are [d ({\AA}), I (relative to 10)]: 3.72, 8; 3.64, 5; 3.43, 5; 2.77, 10; 2.72, 6; 2.57, 3; 2.370, 6; 1.650, 3. The chemical analysis and the X-ray diffraction data of eldfellite correspond to those of the synthetic compound NaFe(SO4)2.",

keywords = "Faculty of Science, eldfellite, nye mineraler, nye mineral arter, eldfellite, new mineral, fumaroles, new mineral species",

author = "{Balic Zunic}, Tonci and A. Garavelli and P. Acquafredda and E. Leonardsen and S.P. Jakobsson",

year = "2009",

doi = "10.1180/minmag.2009.073.1.51",

language = "English",

volume = "73",

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journal = "Mineralogical Magazine",

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TY - JOUR

T1 - Eldfellite, NaFe(SO4)2, a new fumarolic mineral from Eldfell volcano, Iceland

AU - Balic Zunic, Tonci

AU - Garavelli, A.

AU - Acquafredda, P.

AU - Leonardsen, E.

AU - Jakobsson, S.P.

PY - 2009

Y1 - 2009

N2 - A new mineral, eldfellite, was found among fumarolic encrustations collected in 1990 on the Eldfell volcano, Heimaey Island, Iceland. Associated minerals are ralstonite, anhydrite, gypsum, bassanite, hematite, opal and tamarugite, as well as a presumably new mineral with the composition Na3Fe(SO4)3. Along with opal and tamarugite, eldfellite forms soft and fragile aggregates built of thin, platy crystals of micrometre size. The mineral is yellowish-green to greenish-white, with a white streak. The calculated density is 3.062 g/cm3. Eldfellite is monoclinic, C2/m, a 8.043(4) Å, b 5.139(2) Å, c 7.115(4) Å, ß 92.13(2)°, Vuc 293.9(2) Å3, Z = 2 and is isostructural with yavapaiite[KFe(SO4)2]. The strongest lines in the powder diffraction diagram are [d (Å), I (relative to 10)]: 3.72, 8; 3.64, 5; 3.43, 5; 2.77, 10; 2.72, 6; 2.57, 3; 2.370, 6; 1.650, 3. The chemical analysis and the X-ray diffraction data of eldfellite correspond to those of the synthetic compound NaFe(SO4)2.

AB - A new mineral, eldfellite, was found among fumarolic encrustations collected in 1990 on the Eldfell volcano, Heimaey Island, Iceland. Associated minerals are ralstonite, anhydrite, gypsum, bassanite, hematite, opal and tamarugite, as well as a presumably new mineral with the composition Na3Fe(SO4)3. Along with opal and tamarugite, eldfellite forms soft and fragile aggregates built of thin, platy crystals of micrometre size. The mineral is yellowish-green to greenish-white, with a white streak. The calculated density is 3.062 g/cm3. Eldfellite is monoclinic, C2/m, a 8.043(4) Å, b 5.139(2) Å, c 7.115(4) Å, ß 92.13(2)°, Vuc 293.9(2) Å3, Z = 2 and is isostructural with yavapaiite[KFe(SO4)2]. The strongest lines in the powder diffraction diagram are [d (Å), I (relative to 10)]: 3.72, 8; 3.64, 5; 3.43, 5; 2.77, 10; 2.72, 6; 2.57, 3; 2.370, 6; 1.650, 3. The chemical analysis and the X-ray diffraction data of eldfellite correspond to those of the synthetic compound NaFe(SO4)2.

KW - Faculty of Science

KW - eldfellite

KW - nye mineraler

KW - nye mineral arter

KW - eldfellite

KW - new mineral

KW - fumaroles

KW - new mineral species

U2 - 10.1180/minmag.2009.073.1.51

DO - 10.1180/minmag.2009.073.1.51

M3 - Journal article

SN - 0026-461X

VL - 73

SP - 51

EP - 57

JO - Mineralogical Magazine

JF - Mineralogical Magazine

IS - 1

ER -