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Zirklerite

Formula:
(Fe,Mg,Ca)
 
9
Al
 
4
Cl
 
18
(OH)
 
12
·14H
 
2
O (?)
System:TrigonalColour:Light grey
Hardness:3½
Name:Named after Bergrat Zirkler, Director of the potash works at Aschersleben (Germany).
This page provides mineralogical data about Zirklerite.

Classification of Zirklerite

IMA status:Questionable/Doubtful
Strunz 8th edition ID:3/D.04-10
Nickel-Strunz 10th (pending) edition ID:3.CJ.30

3 : HALIDES
C : Complex halides
J : With MX6 complexes; M = Fe, Mn, Cu
Dana 8th edition ID:10.6.5.1

10 : OXYHALIDES AND HYDROXYHALIDES
6 : AmBn(O,OH)pXq
Hey's CIM Ref.:8.6.19

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
6 : Halides of Al
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Type Occurrence of Zirklerite

Type Locality:Adolfsglück-Hope Mine, Schwarmstedt, Lower Saxony, Germany
Year of Discovery:1928
Geological Setting of type material:Breccia-like layers in a bedded evaporite deposit.
Associated Minerals at type locality:
RinneiteQuartzHaliteDolomiteChlorite Group
Anhydrite

Physical Properties of Zirklerite

Diaphaneity (Transparency):Translucent
Colour:Light grey
Hardness (Mohs):3½

Crystallography of Zirklerite

Crystal System:Trigonal
Morphology:Massive; granular to fibrous.

Optical Data of Zirklerite

Type:Uniaxial (+)
RI values: nω = 1.522 nε = 1.552
Maximum Birefringence:δ = 0.030

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Zirklerite

Formula:
(Fe,Mg,Ca)
 
9
Al
 
4
Cl
 
18
(OH)
 
12
·14H
 
2
O (?)
Essential elements:Al, Cl, Fe, H, N, O
All elements listed in formula:Al, Ca, Cl, Fe, H, Mg, O
Common Impurities:Ca

Relationship of Zirklerite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.CJ.05Chlormanganokalite
K
 
4
[MnCl
 
6
]
3.CJ.05Rinneite
K
 
3
Na[FeCl
 
6
]
3.CJ.10Erythrosiderite
K
 
2
[Fe
3+
 
Cl
 
5
(OH
 
2
)]
3.CJ.10Kremersite
(NH
 
4
,K)
 
2
[Fe
3+
 
Cl
 
5
(H
 
2
O)]
3.CJ.15Mitscherlichite
K
 
2
[CuCl
 
4
] · 2H
 
2
O
3.CJ.20Douglasite
K
 
2
[Fe
2+
 
Cl
 
4
(OH
 
2
)
 
2
]
3.CJ.25Redikortsevite
(NH
 
4
)MgCl
 
3
 · 6H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
8.6.1Zharchikhite
AlF(OH)
 
2
8.6.2Chloraluminite
AlCl
 
3
·6H
 
2
O
8.6.3Cadwaladerite
Al(OH)
 
2
Cl·4H
 
2
O
8.6.4Cryolithionite
Na
 
3
Li
 
3
[AlF
 
6
]
 
2
8.6.5Cryolite
Na
 
3
[AlF
 
6
]
8.6.6Chiolite
Na
 
5
Al
 
3
F
 
14
8.6.7Elpasolite
NaK
 
2
[AlF
 
6
]
8.6.8Weberite
Na
 
2
Mg[F|AlF
 
6
]
8.6.9Ralstonite
NaMgAl(F,OH)
 
6
·H
 
2
O
8.6.10Koenenite
Na
 
4
Mg
 
9
Al
 
4
Cl
 
12
(OH)
 
22
8.6.11 Chlor-manasseite
Mg
 
x
Al(OH)
 
2x+2
Cl·(x-0.8)H
 
2
O x about 1.75
8.6.12Gearksutite
Ca[Al(F,OH)
 
5
(H
 
2
O)]
8.6.13Prosopite
CaAl
 
2
(F,OH)
 
8
8.6.14Yaroslavite
Ca
 
3
Al
 
2
F
 
10
(OH)
 
2
·H
 
2
O
8.6.15Carlhintzeite
Ca
 
2
[F|AlF
 
6
] · H
 
2
O
8.6.16Colquiriite
CaLi[AlF
 
6
]
8.6.17Thomsenolite
NaCaAlF
 
6
·H
 
2
O
8.6.18Pachnolite
NaCaAlF
 
6
·H
 
2
O

Other Names for Zirklerite

Other Languages:
German:Zirklerit
Spanish:Zirklerita

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 Zirklerite

Reference List:Kali, Halle (1928), 22, 157-161.

American Mineralogist (1928): 13: 592.

Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume II: 87.

Internet Links for Zirklerite

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    Localities for Zirklerite

    (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.
    Germany
     
    • Lower Saxony
      • Schwarmstedt
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 87.
    Mineral and/or Locality
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