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Eugsterite

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About EugsteriteHide

Hans-Peter Eugster
Formula:
Na4Ca(SO4)3 · 2H2O
Colour:
Colorless
Hardness:
1 - 2
Crystal System:
Monoclinic
Name:
Named in 1981 by Lideke Vergouwen in honor of Hans-Peter Eugster (November 19, 1925–December 17, 1987), geochemist at Johns Hopkins University, Baltimore, Maryland, USA.
This page provides mineralogical data about Eugsterite.


Classification of EugsteriteHide

Approved
7.CD.25

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
D : With only large cations
29.4.2.1

29 : HYDRATED ACID AND NORMAL SULFATES
4 : AmBn(XO4)p·xH2O, with (m+n):p < 3:2 and > 1:1
25.4.6

25 : Sulphates
4 : Sulphates of Ca, Sr and Ba

Physical Properties of EugsteriteHide

Transparency:
Transparent
Colour:
Colorless
Hardness:
1 - 2 on Mohs scale

Optical Data of EugsteriteHide

Type:
Biaxial
RI values:
nα = 1.492 nγ = 1.496
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong

Chemical Properties of EugsteriteHide

Formula:
Na4Ca(SO4)3 · 2H2O

Crystallography of EugsteriteHide

Crystal System:
Monoclinic
Morphology:
Thin fibers

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.20 (39)
5.50 (64)
4.50 (33)
3.454 (32)
3.428 (100)
2.763 (25)
2.746 (46)
1.7126 (61)

Type Occurrence of EugsteriteHide

General Appearance of Type Material:
fibers have a thickness of 0.5-1.5 μm and they are up to 40 μm long
Place of Conservation of Type Material:
National Museum of Geology and Mineralogy, Hooglandse Kerkgracht 17, Leiden. the Netherlands
Geological Setting of Type Material:
Efforvescences in salt pans
Associated Minerals at Type Locality:

Synonyms of EugsteriteHide

Other Language Names for EugsteriteHide

German:Eugsterit
Spanish:Eugsterita

Related Minerals - Nickel-Strunz GroupingHide

7.CD.Campostriniite(Bi3+,Na)3(NH4,K)2Na2(SO4)6·H2OMon. 2/m : B2/b
7.CD.05MatteucciteNaHSO4 · H2OMon.
7.CD.10MirabiliteNa2SO4 · 10H2OMon. 2/m
7.CD.15Lecontite(NH4,K)NaSO4 · 2H2OOrth. 2 2 2 : P21 21 21
7.CD.20HydroglauberiteNa10Ca3(SO4)8 · 6H2OMon.
7.CD.30GörgeyiteK2Ca5(SO4)6 · H2OMon.
7.CD.35Koktaite(NH4)2Ca(SO4)2 · H2OMon.
7.CD.35SyngeniteK2Ca(SO4)2 · H2OMon. 2/m : P21/m
7.CD.40GypsumCaSO4 · 2H2OMon. 2/m
7.CD.45BassaniteCaSO4 · 0.5H2OMon. 2 : B2
7.CD.50Zircosulfate(Zr,Ti)(SO4)2 · 4H2OOrth.
7.CD.55SchieffelinitePb10Te6+6O20(OH)14(SO4)(H2O)5Orth. mmm (2/m 2/m 2/m) : Cmcm
7.CD.60MontaniteBi2(TeO6) · 2H2O
7.CD.65OmongwaiteNa2Ca5(SO4)6 · 3H2OMon. 2 : B2

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.4.1AnhydriteCaSO4Orth. mmm (2/m 2/m 2/m)
25.4.2BassaniteCaSO4 · 0.5H2OMon. 2 : B2
25.4.3GypsumCaSO4 · 2H2OMon. 2/m
25.4.4GlauberiteNa2Ca(SO4)2Mon. 2/m : B2/b
25.4.5CesaniteNa3Ca2(SO4)3(OH)Hex.
25.4.7HydroglauberiteNa10Ca3(SO4)8 · 6H2OMon.
25.4.8SyngeniteK2Ca(SO4)2 · H2OMon. 2/m : P21/m
25.4.9GörgeyiteK2Ca5(SO4)6 · H2OMon.
25.4.10PolyhaliteK2Ca2Mg(SO4)4 · 2H2OTric. 1
25.4.11Koktaite(NH4)2Ca(SO4)2 · H2OMon.
25.4.12Ye'elimiteCa4Al6(SO4)O12Iso.
25.4.13EttringiteCa6Al2(SO4)3(OH)12 · 26H2OTrig. 3m : P3 1c
25.4.14BentoriteCa6(Cr3+,Al)2(SO4)3(OH)12 · 26H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
25.4.15CelestineSrSO4Orth. mmm (2/m 2/m 2/m) : Pnma
25.4.16KalistrontiteK2Sr(SO4)2Trig.
25.4.17BaryteBaSO4Orth. mmm (2/m 2/m 2/m) : Pnma

Other InformationHide

Notes:
Soluble in water
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 EugsteriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Lideke Vergouwen (1981) Eugsterite, a new salt mineral. American Mineralogist 66:632-636

Internet Links for EugsteriteHide

Localities for EugsteriteHide

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.
Argentina
 
  • Salta
    • Los Andes Department
Handbook of Mineralogy
Ovejero Toledo, A., Alonso, R. N., Ruiz, T. D. V., & Quiroga, A. G. (2009). Evapofacieshalítica en el Salar del Rincón, departamento Los Andes, Salta. Revista de la Asociación Geológica Argentina, 64(3), 493-500.
Austria
 
  • Carinthia
    • Hohe Tauern
      • Ankogel group
        • Dösenbach valley
Walter, F. & Bojar, H.-P. (2016): 1960) Polyhalit und Eugsterit (?) auf Skapolith aus einer alpinen Kluft von der Eggeralm, Dösental bei Mallnitz. Pp. 206-207 in Walter, F. et al. (2016): Neue Mineralfunde aus Österreich LXV. Carinthia II, 206./126., 203-250.
Bolivia
 
  • Potosí Department
    • Sud Lípez Province
      • Pastos Grandes
Lizeca, J. L., Moon, W. M., Hutton, C., Wu, L., & Lee, C. W. (1999). Investigation of Pastos Grandes (Bolivia) volcanic features with RADARSAT. In Geoscience and Remote Sensing Symposium, 1999. IGARSS'99 Proceedings. IEEE 1999 International (Vol. 2, pp. 803-805). IEEE.
Canada
 
Kohut, C. K., & Dudas, M. J. (1993). Evaporite mineralogy and trace-element content of salt-affected soils in Alberta. Canadian journal of soil science, 73(4), 399-409.
  • Saskatchewan
Shang, Y. (2000). Mineralogy, lithostratigraphy and geochemistry of North Ingebright Lake, Saskatchewan, Canada. PhD thesis University of Manitoba.
Chile
 
  • Tarapacá Region
    • Iquique Province
      • Chanabaya
SEM/EDAX analyzed - Hans Peter Bojar (main author of Ammineite)
China
 
  • Xinjiang Autonomous Region
    • Akesu Prefecture (Aksu Prefecture; Aqsu Prefecture)
      • Akesu Co. (Aksu Co.; Aqsu Co.)
Akihiko Okada, Sadayo Yabuki, and Congqiang Liu (1994): RIKEN Review 5, 3-4
Akihiko Okada, Sadayo Yabuki, and Congqiang Liu (1994): RIKEN Review 5, 3-4
Akihiko Okada, Sadayo Yabuki, and Congqiang Liu (1994): RIKEN Review 5, 3-4
    • Aral Co. (Ala'er Co.)
Akihiko Okada, Sadayo Yabuki, and Congqiang Liu (1994): RIKEN Review 5, 3-4
    • Bayin'gholin Autonomous Prefecture (Bayingolin Autonomous Prefecture; Bayinguoleng Autonomous Prefecture)
      • Hoxud Co. (Hoxut Co.; Xoshut Co.; Heshuo Co.)
Akihiko Okada, Sadayo Yabuki, and Congqiang Liu (1994): RIKEN Review 5, 3-4
Akihiko Okada, Sadayo Yabuki, and Congqiang Liu (1994): RIKEN Review 5, 3-4
    • Tulufan Prefecture (Turfan Prefecture; Turpan Prefecture)
      • Tulufan Co. (Turfan Co.; Turpan Co.)
        • Turfan basin (Turpan basin)
Akihiko Okada, Sadayo Yabuki, and Congqiang Liu (1994): RIKEN Review 5, 3-4
Germany
 
  • North Rhine-Westphalia
    • Ruhr Coal Mining area
      • Kamp-Lintfort
Ingendahl, J. (2016): Tief im Westen - Mineralienfunde aus dem Steinkohlebergwerk West. Mineralien-Welt, 27 (4), 61-72.
  • Saxony-Anhalt
    • Börde
      • Morsleben
Gunnar Färber
Japan
 
  • Kyushu Region
    • Kagoshima Prefecture
      • Kirishima City
        • Makizono
Kobayashi et al (2005) Koubutsu-Gakkai Kou'en-Youshi, 153.
Kenya (TL)
 
  • Homa Bay County
Vergouwen, L. (1981) Eugsterite, a new salt mineral. American Mineralogist, 66, 632-636.
  • Turkana County
Am Min 66:632-635
  • Vihiga County
Vergouwen, L. (1981) Eugsterite, a new salt mineral. American Mineralogist, 66, 632-636.
Peru
 
  • La Libertad Department
    • Pacasmayo Province
      • Jequetepeque
Mees, F., & Stoops, G. (1991). Mineralogical study of salt efflorescences on soils of the Jequetepeque Valley, northern Peru. Geoderma, 49(3-4), 255-272.
Russia
 
  • Eastern-Siberian Region
    • Khakassia Republic (Khakassy Republic; Khakassiya Republic)
      • Ust-Abakan
Arkhipov, A. L., Ivanova, M. O., & Tishin, P. A. (2015). Zonality and Mineral Association of Modern Evaporates in the South-Minusinsk Basin by the Example of Taloe Lake and Ak-Kol Lake (Khakassia Republic). International Multidisciplinary Scientific GeoConference: SGEM: Surveying Geology & mining Ecology Management, 1, 537.
Spain
 
  • Aragón
    • Huesca
      • Flumen-Monegros District
Vizcayno, C., Garcia-Gonzalez, M. T., Gutierrez, M., & Rodriguez, R. (1995). Mineralogical, chemical and morphological features of salt accumulations in the Flumen-Monegros district, NE Spain. Geoderma, 68(3), 193-210.
Vizcayno, C., Garcia-Gonzalez, M. T., Gutierrez, M., & Rodriguez, R. (1995). Mineralogical, chemical and morphological features of salt accumulations in the Flumen-Monegros district, NE Spain. Geoderma, 68(3), 193-210.
    • Zaragoza
      • Zaragoza
Mees, F., Castañeda, C., Herrero, J., & Van Ranst, E. (2011). Bloedite sedimentation in a seasonally dry saline lake (Salada Mediana, Spain). Sedimentary Geology, 238(1-2), 106-115.
Switzerland
 
  • Vaud (Waadt)
    • Bex
Musée Cantonale de Géologie de Lausanne - Bulletin d'Activité 2005
Turkey (TL)
 
  • Central Anatolia Region
    • Konya Province
      • Great Konya Basin
Am. Min. 66 (1981), 632
Lideke Vergouwen (1981) Eugsterite, a new salt mineral. American Mineralogist 66:632-636
USA
 
  • California
    • Inyo Co.
      • Death Valley
Econ Geol (1996) 91:622-635
  • Colorado
    • Weld Co.
Zielinski, R. A., Otton, J. K., & Johnson, C. A. (2001). Sources of salinity near a coal mine spoil pile, north-central Colorado. Journal of environmental quality, 30(4), 1237-1248.
  • Nevada
    • Clark Co.
Buck, B. J., Wolff, K., Merkler, D. J., & McMillan, N. J. (2006). Salt Mineralogy of Las Vegas Wash, Nevada. Soil Science Society of America Journal, 70(5), 1639-1651.
Mineral and/or Locality  
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