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Metathénardite

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About MetathénarditeHide

A name applied to a high-temperature, hexagonal polymorph of Na2SO4. Approved as a new mineral in 2016. All specimens with metathénardite were collected from areas with temperatures of 350–400 °C



Classification of MetathénarditeHide

Approved
Approval Year:
2016
7.AC.30

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
C : With medium-sized and large cations

Physical Properties of MetathénarditeHide

Vitreous
Transparency:
Transparent
Colour:
colorless, white, light-blue, greenish, yellowish, grayish or brownish,
Density:
2.72(2) g/cm3 (Measured)    2.717 g/cm3 (Calculated)

Optical Data of MetathénarditeHide

Type:
Uniaxial (-)
RI values:
nω = 1.489(2) nε = 1.486(2)
Max Birefringence:
δ = 0.003
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of MetathénarditeHide

Formula:
Na2SO4
IMA Formula:
Na2(SO4)

Crystallography of MetathénarditeHide

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P63/mmc
Setting:
P63/mmc
Cell Parameters:
a = 5.3467(9) Å, c = 7.088(2) Å
Ratio:
a:c = 1 : 1.326
Unit Cell V:
175.48 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.667 Å(27)
3.904 Å(89)
3.565 Å(33)
2.824 Å(94)
2.686 Å(100)
2.325 Å(12)
2.203 Å(10)
1.939 Å(35)

Geological EnvironmentHide

Paragenetic Mode(s):
•  Fumarolic

Type Occurrence of MetathénarditeHide

General Appearance of Type Material:
hexagonal tabular, lamellar, or dipyramidal crystals (forms: {001}, {100}, {102}, and {201}) up to 3 mm combined in crusts up to several hundred cm2 in area.
Place of Conservation of Type Material:
collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia (registration number 4771/1)
Geological Setting of Type Material:
Volcanic fumaroles
Associated Minerals at Type Locality:
Reference:
Pekov, I. V., Shchipalkina, N. V., Zubkova, N. V., Gurzhiy, V. V., Agakhanov, A. A., Belakovskiy, D. I., ... & Sidorov, E. G. (2019). Alkali sulfates with aphthitalite-like structures from fumaroles of the Tolbachik volcano, Kamchatka, Russia. I. Metathenardite, a natural high-temperature modification of Na2SO4. The Canadian Mineralogist, 57(6), 885-901.

Synonyms of MetathénarditeHide

Related Minerals - Nickel-Strunz GroupingHide

7.AC.Aluminopyracmonite(NH4)3Al(SO4)3Trig. 3 : R3
7.AC.Acmonidesite(NH4,K,Pb)8NaFe2+4(SO4)5Cl8Orth. 2 2 2 : C2 2 21
7.AC.05VanthoffiteNa6Mg(SO4)4Mon. 2/m : P21/b
7.AC.08Pyracmonite(NH4)3Fe(SO4)3Trig. 3m : R3c
7.AC.10Efremovite(NH4)2Mg2(SO4)3Iso.
7.AC.10LangbeiniteK2Mg2(SO4)3Iso. 2 3 : P21 3
7.AC.10ManganolangbeiniteK2Mn2(SO4)3Iso. 2 3 : P21 3
7.AC.15YavapaiiteKFe(SO4)2Mon. 2/m : B2/m
7.AC.15EldfelliteNaFe3+(SO4)2Mon. 2/m : B2/m
7.AC.20Godovikovite(NH4)Al(SO4)2Trig. 3 2 : P3 2 1
7.AC.20Sabieite(NH4)Fe3+(SO4)2Trig. 3 2 : P3 2 1
7.AC.25ThénarditeNa2SO4Orth. mmm (2/m 2/m 2/m) : Fddd
7.AC.35Aphthitalite(K,Na)3Na(SO4)2Trig.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for MetathénarditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Lacroix (1905) Bulletin de la Société française de Minéralogie: 23: 65.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 407.
Pekov, I.V., Gurzhiy, V.V., Zubkova, N.V., Agakhanov, A.A., Belakovskiy, D.I., Vigasina, M.F. Sidorov, E.G. (2016): Metathénardite, IMA 2015-102. CNMNC Newsletter No. 30,April 2016, page 408; Mineralogical Magazine: 80: 407–413
Pekov, I. V., Shchipalkina, N. V., Zubkova, N. V., Gurzhiy, V. V., Agakhanov, A. A., Belakovskiy, D. I., ... & Sidorov, E. G. (2019). Alkali sulfates with aphthitalite-like structures from fumaroles of the Tolbachik volcano, Kamchatka, Russia. I. Metathenardite, a natural high-temperature modification of Na2SO4. The Canadian Mineralogist, 57(6), 885-901.

Internet Links for MetathénarditeHide

Localities for MetathénarditeHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
France
 
  • French West Indies
    • Martinique
      • Saint-Pierre
Palache, Charles, Harry Berman & Clifford Frondel (1951), Dana's System of Mineralogy, 7th edition, Volume 2: 407.
Iceland
 
  • Southern Region
    • Rangárþing eystra
Balić-Žunić, T., Garavelli, A., Jakobsson, S. P., Jonasson, K., Katerinopoulos, A., Kyriakopoulos, K., & Acquafredda, P. (2016). Fumarolic minerals: An overview of active European volcanoes. In Updates in Volcanology-From Volcano Modelling To Volcano Geology. InTechOpen.
    • Vestmannaeyjar
      • Vestmannaeyjar archipelago (Westman islands)
        • Heimaey island
Mitolo, D., Garavelli, A., Pedersen, L., Balić-Žunić, T., Jakobsson, S.P., Vurro, F. (2008): Mineralogy of actually forming sublimates at Eldfell Volcano, Heimaey (Vestmannaeyjar archipelago), Iceland. Plinius, 34, 322.
Russia (TL)
 
  • Kamchatka Krai
    • Tolbachik volcano
      • Great Fissure eruption (Main Fracture)
        • Northern Breakthrough (North Breach)
          • Second scoria cone
XRD and EPMA by Dr. Igor Pekov; Pekov, I. V., Shchipalkina, N. V., Zubkova, N. V., Gurzhiy, V. V., Agakhanov, A. A., Belakovskiy, D. I., ... & Sidorov, E. G. (2019). Alkali sulfates with aphthitalite-like structures from fumaroles of the Tolbachik volcano, Kamchatka, Russia. I. Metathenardite, a natural high-temperature modification of Na2SO4. The Canadian Mineralogist, 57(6), 885-901.
Pekov, I.V., Zubkova, N.V., Zolotarev, A.A., Yapaskurt, V.O., Krivovichev, S.V., Belakovskiy, D.I., Lykova, I.S., Vigasina, M.F., Kasatkin, A.V., Sidorov, E.G., Pushcharovsky, D.Y. (2016) Dioskouriite, IMA 2015-106. CNMNC Newsletter No. 30, April 2016, page 409; Mineralogical Magazine: 80: 407–413.
Pekov, I. V., Shchipalkina, N. V., Zubkova, N. V., Gurzhiy, V. V., Agakhanov, A. A., Belakovskiy, D. I., ... & Sidorov, E. G. (2019). Alkali sulfates with aphthitalite-like structures from fumaroles of the Tolbachik volcano, Kamchatka, Russia. I. Metathenardite, a natural high-temperature modification of Na2SO4. The Canadian Mineralogist, 57(6), 885-901.
 
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