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Görgeyite

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Kazakhstan
© Rob Lavinsky

Show Görgeyite Photos (7)
Formula:
K
 
2
Ca
 
5
(SO
 
4
)
 
6
·H
 
2
O
System:MonoclinicColour:Colorless to yellowish.
Lustre:VitreousHardness:3½
Name:Named for Rolf von Görgey (1886-1915), Austrian mineralogist.
This page provides mineralogical data about Görgeyite.

Classification of Görgeyite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Nickel-Strunz 10th (pending) edition ID: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 edition ID:29.4.7.1
Dana 8th edition ID:29.4.7.1

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

25 : Sulphates
4 : Sulphates of Ca, Sr and Ba
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Type Occurrence of Görgeyite

Type Locality:Ischler Salzberg, Perneck, Bad Ischl, Upper Austria, Austria

Physical Properties of Görgeyite

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

Crystallography of Görgeyite

Crystal System:Monoclinic

Optical Data of Görgeyite

Type:Biaxial (+)
RI values: nα = 1.560 nβ = 1.569 nγ = 1.584
2V:Measured: 79° , Calculated: 78°
Maximum Birefringence:δ = 0.024

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:none

Chemical Properties of Görgeyite

Formula:
K
 
2
Ca
 
5
(SO
 
4
)
 
6
·H
 
2
O
Essential elements:Ca, H, K, O, S
All elements listed in formula:Ca, H, K, O, S

Relationship of Görgeyite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.CD.05Matteuccite
NaHSO
 
4
·H
 
2
O
7.CD.10Mirabilite
Na
 
2
SO
 
4
·10H
 
2
O
7.CD.15Lecontite
(NH
 
4
,K)Na(SO
 
4
)·2H
 
2
O
7.CD.20Hydroglauberite
Na
 
10
Ca
 
3
(SO
 
4
)
 
8
·6H
 
2
O
7.CD.25Eugsterite
Na
 
4
Ca(SO
 
4
)
 
3
·2H
 
2
O
7.CD.35Koktaite
(NH
 
4
)
 
2
Ca(SO
 
4
)
 
2
·H
 
2
O
7.CD.35Syngenite
K
 
2
Ca(SO
 
4
)
 
2
·H
 
2
O
7.CD.40Gypsum
Ca[SO
 
4
] · 2H
 
2
O
7.CD.45Bassanite
Ca[SO
 
4
] · 0.5H
 
2
O
7.CD.50Zircosulfate
(Zr,Ti)(SO
 
4
)
 
2
·4H
 
2
O
7.CD.55Schieffelinite
Pb
 
8
(TeO
 
4
)
 
5
(SO
 
4
)
 
3
·8H
 
2
O
7.CD.60Montanite
Bi
 
2
[TeO
 
6
] · 2H
 
2
O
7.CD.65Omongwaite
Na
 
2
Ca
 
5
(SO
 
4
)
 
6
·3H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
25.4.1Anhydrite
CaSO
 
4
25.4.2Bassanite
Ca[SO
 
4
] · 0.5H
 
2
O
25.4.3Gypsum
Ca[SO
 
4
] · 2H
 
2
O
25.4.4Glauberite
Na
 
2
Ca(SO
 
4
)
 
2
25.4.5Cesanite
Na
 
3
Ca
 
2
[OH|(SO
 
4
)
 
3
]
25.4.6Eugsterite
Na
 
4
Ca(SO
 
4
)
 
3
·2H
 
2
O
25.4.7Hydroglauberite
Na
 
10
Ca
 
3
(SO
 
4
)
 
8
·6H
 
2
O
25.4.8Syngenite
K
 
2
Ca(SO
 
4
)
 
2
·H
 
2
O
25.4.10Polyhalite
K
 
2
Ca
 
2
Mg(SO
 
4
)
 
4
·2H
 
2
O
25.4.11Koktaite
(NH
 
4
)
 
2
Ca(SO
 
4
)
 
2
·H
 
2
O
25.4.12Ye'elimite
Ca
 
4
Al
 
6
[O
 
12
|SO
 
4
]
25.4.13Ettringite
Ca
 
6
Al
 
2
[(OH)
 
4
|SO
 
4
]
 
3
 · 26H
 
2
O
25.4.14Bentorite
Ca
 
6
(Cr
3+
 
,Al)
 
2
[(OH)
 
4
|SO
 
4
]
 
3
 · 26H
 
2
O
25.4.15Celestine
SrSO
 
4
25.4.16Kalistrontite
K
 
2
Sr(SO
 
4
)
 
2
25.4.17Baryte
BaSO
 
4

Other Names for Görgeyite

Synonyms:
GoergyiteMikheeviteMikheyevite
Other Languages:
German:Goergyit
Görgeyit
Micheevit
Mikheevit
Mikheyevit
Russian:Гергейит
Spanish:Goergyita
Görgeyita
Mikheevita
Mikheyevita

Other Information

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

References for Görgeyite

Reference List:American Mineralogist: 39: 403.

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).

Internet Links for Görgeyite

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  • Raman and XRD data at RRUFF project
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    Localities for Görgeyite

    Hide Locality List
    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Austria
     
    • Upper Austria
      • Bad Ischl
        • Perneck
    		N.Jahrb.Min.,Mh.(1953), 35-44
    China
     
    • Hubei Province
      • Qianjiang Co.
    		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.
    Italy
     
    • Latium
      • Rome Province
        • Bracciano Lake
          • Cesano geothermal field
    		Mineralogical Magazine 1981 44 : 269-273.
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 7th Nov 2009 11:49:21