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Konyaite

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Great Konya Basin, Konya Province, Central Anatolia Region, Turkey
© 2008, J. Weissman

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.

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

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
·4H
 
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.65Wattevilleite
Na
 
2
Ca(SO
 
4
)
 
2
·4H
 
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
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
[(OH)
 
4
|(SO
 
4
)
 
5
] · 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[F|SO
 
4
] · 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 (1982): 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.

Articles/Blogs about Konyaite

Internet Links for Konyaite

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    Localities for Konyaite

    (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.
    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
    Romania
     
    • Maramures Co.
      • 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.
    Mineral and/or Locality
    Google
     
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