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Konyaite

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Great Konya Basin, Konya Province, Central Anatolia Region, Turkey
© 2008, JGW




Formula:
Na
 
2
Mg(SO
 
4
)
 
2
 · 5H
 
2
O
System:MonoclinicColour:White, colourless
Lustre:Hardness:2½
Name:After the locality near Cakmak, Great Konya Basin, Konya Province, Central Anatolia Region, Turkey.


A water-soluble mineral that occurs as a component of salt efflorescences on saline soils, formed between 30°C and 50°C by evaporation of ground and surface waters.

Related to the Picromerite Group.

Classification of Konyaite

IMA status:Approved
Strunz 8th edition ID:6/C.18-40
Nickel-Strunz 10th (pending) edition ID:7.CC.80

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
Dana 8th edition ID:29.3.5.1

29 : HYDRATED ACID AND NORMAL SULFATES
3 : A2B(XO4)2·xH2O
Hey's CIM Ref.:25.3.10

25 : Sulphates
3 : Sulphates of Mg
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Type Occurrence of Konyaite

Type Locality:Cakmak, Great Konya Basin, Konya Province, Central Anatolia Region, Turkey
Year of Discovery:1982

Occurrences of Konyaite

Geological Setting:Occurs in salt efflorescences on saline soils, formed between 30° C and 50° C.
by evaporation of ground and surface waters.

Physical Properties of Konyaite

Diaphaneity (Transparency):Transparent
Colour:White, colourless
Hardness (Mohs):2½
Density (measured):2.088 g/cm3
Density (calculated):2.097 g/cm3

Crystallography of Konyaite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
Cell Parameters:a = 5.78Å, b = 24.01Å, c = 8.67Å
β = 95.41°
Ratio:a:b:c = 0.241 : 1 : 0.361
Unit Cell Volume:V 1,197.84 ų (Calculated from Unit Cell)
Z:4

Optical Data of Konyaite

Type:Biaxial (+)
RI values: nα = 1.464 nβ = 1.468 nγ = 1.474
2V:Measured: 74° , Calculated: 80°
Maximum Birefringence:δ = 0.010

Chart 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 Konyaite

Formula:
Na
 
2
Mg(SO
 
4
)
 
2
 · 5H
 
2
O
Essential elements:H, Mg, Na, O, S
All elements listed in formula:H, Mg, Na, O, S

Relationship of Konyaite to other Species

Structurally related to group(s):
Picromerite Group
A
 
2
B(XO
 
4
)
 
2
·6H
 
2
O
Common Associates:
TychiteThenarditeStarkeyiteMirabiliteLöweite
HexahydriteHaliteGypsumEpsomiteBurkeite
Blödite
Related Minerals - Nickel-Strunz Grouping):

- +
7.CC.05Krausite
KFe(SO
 
4
)
 
2
 · H
 
2
O
7.CC.10Tamarugite
NaAl(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.15Kalinite
KAl(SO
 
4
)
 
2
 · 11H
 
2
O Not confirmed
7.CC.15Mendozite
NaAl(SO
 
4
)
 
2
 · 11H
 
2
O
7.CC.20Lonecreekite
(NH
 
4
)Fe
3+
 
(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.20Alum-(K)
KAl(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.20Alum-(Na)
NaAl(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.20Tschermigite
(NH
 
4
)Al(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.20Lanmuchangite
Tl
+
 
Al(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.25Voltaite
K
 
2
Fe
2+
5
Fe
3+
3
Al(SO
 
4
)
 
12
 · 18H
 
2
O
7.CC.25Zincovoltaite
K
 
2
Zn
 
5
Fe
3+
3
Al(SO
 
4
)
 
12
 · 18H
 
2
O
7.CC.25Pertlikite
K
 
2
(Fe
2+
 
,Mg)
 
2
Mg
 
4
Fe
3+
2
Al(SO
 
4
)
 
12
 · 18H
 
2
O
7.CC.25Ammoniomagnesiovoltaite
(NH
 
4
)
 
2
Mg
2+
5
Fe
3+
3
Al(SO
 
4
)
 
12
 · 18H
 
2
O
7.CC.30Kröhnkite
Na
 
2
Cu(SO
 
4
)
 
2
 · 2H
 
2
O
7.CC.35Ferrinatrite
Na
 
3
Fe(SO
 
4
)
 
3
 · 3H
 
2
O
7.CC.40Goldichite
KFe(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.45Löweite
Na
 
12
Mg
 
7
(SO
 
4
)
 
13
7.CC.50Blödite
Na
 
2
Mg(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.50Nickelblödite
Na
 
2
(Ni,Mg)(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.50Changoite
Na
 
2
Zn(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.50Zincblödite
7.CC.55Leonite
K
 
2
Mg(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.55Mereiterite
K
 
2
Fe(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.60Boussingaultite
(NH
 
4
)
 
2
Mg(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.60Cyanochroite
K
 
2
Cu(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.60Mohrite
(NH
 
4
)
 
2
Fe(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.60Nickelboussingaultite
(NH
 
4
)
 
2
Ni(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.60Picromerite
K
 
2
Mg(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.65Polyhalite
K
 
2
Ca
 
2
Mg(SO
 
4
)
 
4
 · 2H
 
2
O
7.CC.70Leightonite
K
 
2
Ca
 
2
Cu(SO
 
4
)
 
4
 · 2H
 
2
O
7.CC.75Amarillite
NaFe(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.85Wattevilleite
Na
 
2
Ca(SO
 
4
)
 
2
 · 4H
 
2
O (?)
Related Minerals - Hey's Index Grouping:

- +
25.3.1Kieserite
MgSO
 
4
 · H
 
2
O
25.3.2Sanderite
MgSO
 
4
 · 2H
 
2
O
25.3.3Starkeyite
MgSO
 
4
 · 4H
 
2
O
25.3.4Pentahydrite
MgSO
 
4
 · 5H
 
2
O
25.3.5Hexahydrite
MgSO
 
4
 · 6H
 
2
O
25.3.6Epsomite
MgSO
 
4
 · 7H
 
2
O
25.3.7Caminite
Mg
 
7
(SO
 
4
)
 
5
(OH)
 
4
 · H
 
2
O
25.3.8Vanthoffite
Na
 
6
Mg(SO
 
4
)
 
4
25.3.9Blödite
Na
 
2
Mg(SO
 
4
)
 
2
 · 4H
 
2
O
25.3.11Löweite
Na
 
12
Mg
 
7
(SO
 
4
)
 
13
25.3.12Uklonskovite
NaMg(SO
 
4
)F · 2H
 
2
O
25.3.13Langbeinite
K
 
2
Mg
 
2
(SO
 
4
)
 
3
25.3.14Leonite
K
 
2
Mg(SO
 
4
)
 
2
 · 4H
 
2
O
25.3.15Picromerite
K
 
2
Mg(SO
 
4
)
 
2
 · 6H
 
2
O
25.3.16Efremovite
(NH
 
4
)
 
2
Mg
 
2
(SO
 
4
)
 
3
25.3.17Boussingaultite
(NH
 
4
)
 
2
Mg(SO
 
4
)
 
2
 · 6H
 
2
O
25.3.18Pickeringite
MgAl
 
2
(SO
 
4
)
 
4
 · 22H
 
2
O

Other Names for Konyaite

Synonyms:
IMA1981-003
Other Languages:
German:Konyait
Spanish:Konyaita

Other Information

Other Information:Very easily soluble in water. Unstable - alters to blödite in a relatively short period of time.
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 Konyaite

Reference List:

- +
van Doesburg, J.D.J., L. Vergouwen, and L. van der Plas (1982): Konyaite, Na2Mg(SO4)2•5H2O, a new mineral from the Great Konya Basin, Turkey. American Mineralogist 67, 1035-1038.

American Mineralogist (1989): 74: 1382.

Dokoupilová, P., Sracek, O. & Losos, Z. (2007) Geochemical behaviour and mineralogical transformations during spontaneous combustion of a coal waste pile in Oslavany, Czech Republic, Mineralogical Magazine, 71, 443-460.

Leduc, E.M.S., Peterson, R.C., Wang, R. (2009): The crystal structure and hydrogen bonding of synthetic konyaite, Na2Mg(SO4)2•5H2O. American Mineralogist, 94, 1005-1011.

Mills, S. J., Wilson, S. A., Dipple, G. M. & Raudsepp, M. (2010) The decomposition of konyaite: Importance in CO2 in mine tailings. Mineralogical Magazine, 74(5), 903–917.

Internet Links for Konyaite

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  • Raman and XRD data at RRUFF project
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  • Konyaite details from Handbook of Mineralogy (PDF)
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    • Localities for Konyaite

    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.
    Hide Locality List
    (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.
    Australia
     
    • Western Australia
      • Wiluna Shire
        • Mount Keith
    		Mills, S. J., Wilson, S. A., Dipple, G. M. & Raudsepp, M. (2010) The decomposition of konyaite: Importance in CO2 in mine tailings. Mineralogical Magazine, 74(5), 903–917.
    China
     
    Akihiko Okada, Sadayo Yabuki, and Congqiang Liu (1994): RIKEN Review 5, 3-4
    Czech Republic
     
    • Moravia (Mähren; Maehren)
      • South Moravia Region
        • Oslavany
    		Dokoupilova P., Sulovsky P., Losos Z. 2006: Hematite, hexahydrite and picromerite group from the mine waste of the coal mine Kukla in Oslavany. Mineralogia Polonica - Special Papers, vol. 28, 57-59
    France
     
    • Nord-Pas-de-Calais
      • Pas-de-Calais
    		Naze-Nancy Masalehdani, M., Mees, F., Dubois, M., Coquinot, Y., Potdevin, J.-L., Fialin, M. & Blanc-Valleron, M.-M. (2009): Condensate minerals from a burning coal-waste heap in Avion, Northern France. Can. Mineral. 47, 573-591.
    Romania
     
    • Maramures Co.
      • Rodna (Rodnei) Mts
    		Mineralogical Magazine: 65(1): 1-7.
    Turkey
     
    • Central Anatolia Region
      • Konya Province
        • Great Konya Basin
    		Amer.Min.(1982) 67, 1035-1038
    USA
     
    • Colorado
      • Weld Co.
    		Minerals of Colorado (1997) Eckels, E. B.
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