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Görgeyite

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Formula:
K2Ca5(SO4)6 · H2O
Colour:
Colorless to yellowish.
Lustre:
Vitreous
Hardness:
Crystal System:
Monoclinic
Name:
Named for Rolf von Görgey (1886-1915), Austrian mineralogist.
Isostructural with:
This page provides mineralogical data about Görgeyite.


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Classification of GörgeyiteHide

Approved, 'Grandfathered' (first described prior to 1959)
7.CD.30

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
D : With only large cations
Dana 7th ed.:
29.4.7.1
29.4.7.1

29 : HYDRATED ACID AND NORMAL SULFATES
4 : AmBn(XO4)p·xH2O, with (m+n):p < 3:2 and > 1:1
25.4.9

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

Physical Properties of GörgeyiteHide

Vitreous
Colour:
Colorless to yellowish.
Streak:
(not reported)
Hardness:
3½ on Mohs scale

Optical Data of GörgeyiteHide

Type:
Biaxial (+)
RI values:
nα = 1.560 nβ = 1.569 nγ = 1.584
2V:
Measured: 79° , Calculated: 78°
Max Birefringence:
δ = 0.024
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
none

Chemical Properties of GörgeyiteHide

Formula:
K2Ca5(SO4)6 · H2O

Crystallography of GörgeyiteHide

Crystal System:
Monoclinic

Type Occurrence of GörgeyiteHide

Synonyms of GörgeyiteHide

Other Language Names for GörgeyiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Hydroboracite1 photo of Görgeyite associated with Hydroboracite on mindat.org.

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.25EugsteriteNa4Ca(SO4)3 · 2H2OMon.
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.
25.4.6EugsteriteNa4Ca(SO4)3 · 2H2OMon.
25.4.7HydroglauberiteNa10Ca3(SO4)8 · 6H2OMon.
25.4.8SyngeniteK2Ca(SO4)2 · H2OMon. 2/m : P21/m
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

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 GörgeyiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hayrhofer, H. (1953): Görgeyit, ein neues Mineral aus der Ischler Salzlagerstätte. Neues Jahrbuch für Mineralogie, Monatshefte, 1953, 35-44.
American Mineralogist: 39: 403.
Mukhtarova, N. N., Kalinin, V. R., Rastsvetaeva, R. K., Ilyukhin, V. V., Belov, N. V. (1980): Crystal structure of görgeyite K2Ca5(SO4)6·(H2O). Doklady Akademii Nauk SSSR, 52, 102-105.
Smith, G. W. & Walls, R. (1980): The crystal structure of görgeyite K2SO4·5CaSO4·H2O. Zeitschrift für Kristallographie, 151, 49-60.
Keqin Cai, Dejun Zhao, Linzhi Liao, and Xinhua Huang (1985): The Mineralogy of Gorgeyite. Journal of China University of Geoscience 10(4), 21-28 (in Chinese with English abstract).
Kloprogge, J. T., Hickey, L., Duong, L. V., Martens, W. N., Frost, R. L. (2004): Synthesis and characterization of K2Ca5(SO4)6·H2O, the equivalent of görgeyite, a rare evaporite mineral. American Mineralogist, 89, 266-272.

Internet Links for GörgeyiteHide

Localities for GörgeyiteHide

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.
Australia
 
  • South Australia
    • Flinders Ranges
      • North Flinders Ranges
        • Wooltana homestead area
Snow, M. R., Pring, A., & Allen, N. (2014). Minerals of the Wooltana Cave, Flinders Ranges, South Australia. Transactions of the Royal Society of South Australia, 138(2), 214-230.
Austria (TL)
 
  • Upper Austria
    • Gmunden
      • Bad Ischl
        • Perneck
N.Jahrb.Min.,Mh.(1953), 35-44
China
 
  • Hubei Province
    • Wuhan Prefecture
      • Jianghan District
Anthony, J.W. et al.: Handbook of Mineralogy
  • Sichuan Province
    • Dazhou Prefecture
      • Qu Co.
Keqin Cai, Dejun Zhao, Linzhi Liao, and Xinhua Huang (1985): Journal of China University of Geoscience 10(4), 21-28; Min Mo (1987): Acta Mineralogica Sinica 7(2), 154-158
Germany
 
  • North Rhine-Westphalia
    • Aachen
      • Alsdorf
Witzke, T., de Wit, F., Kolitsch, U. and Blaß, G. (2015): Mineralogy of the Burning Anna I Coal Mine Dump, Alsdorf, Germany. Chapter 7, pp. 203-240, in: Stracher, G. B., Prakash, A. and Sokol, E. V.: Coal and Peat Fires: A Global Perspective, Volume 3: Case Studies - Coal Fires, Elsevier, 786 pp.
Italy
 
  • Latium
    • Rome Province
      • Bracciano Lake
        • Cesano geothermal field
Cavarretta, G., Mottana, A., Tecce, F. (1981): Cesanite, Ca2Na3[(OH)(SO4)3], a sulphate isotypic to apatite, from the Cesano geothermal field (Latium, Italy). Mineral. Mag., 44, 269-273; Cavarretta, G., Mottana, A., Tecce, F. (1982): Goergeyite e syngenite nei pozzi geotermici di Cesano (Lazio). Rendiconti Soc. Ital. Mineral. Petrol., 38, 902; Stoppani, F.S., Curti, E. (1982): I minerali del Lazio. Editoriale Olimpia, Firenze, 291 pp.; Cavarretta, G., Mottana, A., Tecce, F. (1983): Görgeyite and syngenite in the Cesano geothermal field (Latium, Italy). Neues Jb. Mineral. Abh., 147, 304–314.
Cavarretta, G., Mottana, A., Tecce, F. (1982): Goergeyite e syngenite nei pozzi geotermici di Cesano (Lazio). Rendiconti Soc. Ital. Mineral. Petrol., 38, 902; Stoppani, F.S., Curti, E. (1982): I minerali del Lazio. Editoriale Olimpia, Firenze, 291 pp.; Cavarretta, G., Mottana, A., Tecce, F. (1983): Görgeyite and syngenite in the Cesano geothermal field (Latium, Italy). Neues Jahrb. Mineral. Abh., 147, 304–314.
Kazakhstan
 
  • Atyrau Province (Atyrau Oblysy; Atyrau Oblast')
    • Atyrau (Gur'yev)
Pavel M. Kartashov data; Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30; Pekov, I. V. & Abramov, D. V. (1993): Boron deposit of the Inder and its minerals. World of Stones, 1, 23-30.
Mineral and/or Locality  
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