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Flörkeite

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Caspar quarry, Ettringer Bellerberg Mt. (Bellberg Mt.; Bellenberg Mt.; Billenberg Mt.; Boilenberg Mt.), Bellerberg volcano, Ettringen, Mayen, Eifel Mts, Rhineland-Palatinate, Germany
© Stephan Wolfsried

Show Flörkeite Photos (7)
Formula:
(K
 
3
Ca
 
2
Na)[Al
 
8
Si
 
8
O
 
32
]·12H
 
2
O
System:Triclinic


Zeolite Group.

A distinctly triclinic zeolite, closely related to phillipsite (monoclinic). The triclinic distortion is caused by Al-Si ordering in the crystal structure.

Classification of Flörkeite

IMA status:Approved 2008
Nickel-Strunz 10th (pending) edition ID:9.GC.10

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
C : Chains of doubly-connected 4-membered rings
Dana 8th edition ID:77.1.10.5

77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites
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Type Occurrence of Flörkeite

Type Locality:Caspar quarry, Ettringer Bellerberg Mt. (Bellberg Mt.; Bellenberg Mt.; Billenberg Mt.; Boilenberg Mt.), Bellerberg volcano, Ettringen, Mayen, Eifel Mts, Rhineland-Palatinate, Germany

Crystallography of Flörkeite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 19.965Å, b = 14.271Å, c = 8.704Å
α = 88.37°, β = 125.08°, γ = 89.57°
Ratio:a:b:c = 1.399 : 1 : 0.61
Unit Cell Volume:V 2,027.78 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
4.965 (45)
4.065 (35)
3.235 (100)
3.162 (80)
3.135 (80)
2.736 (60)
2.712 (40)

Chemical Properties of Flörkeite

Formula:
(K
 
3
Ca
 
2
Na)[Al
 
8
Si
 
8
O
 
32
]·12H
 
2
O
Essential elements:Al, Ca, H, K, Na, O, Si
All elements listed in formula:Al, Ca, H, K, Na, O, Si

Relationship of Flörkeite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.GC.05Amicite
K
 
2
Na
 
2
Al
 
4
Si
 
4
O
 
16
·5H
 
2
O
9.GC.05Garronite
Na
 
2
Ca
 
5
Al
 
12
Si
 
20
O
 
64
·27H
 
2
O
9.GC.05Gismondine-Ca
CaAl
 
2
Si
 
2
O
 
8
·4H
 
2
O
9.GC.05Gobbinsite
Na
 
4
(Ca,Mg,K
 
2
)Al
 
6
Si
 
10
O
 
32
·12H
 
2
O
9.GC.05Gismondine
Ca[Al
 
2
Si
 
2
O
 
8
]·4.5H
 
2
O
9.GC.10Harmotome
(Ba
 
0.5
,Ca
 
0.5
,K,Na)
 
5
[Al
 
5
Si
 
11
O
 
32
] ·12H
 
2
O
9.GC.10Phillipsite-Ca
(Ca
 
0.5
,K,Na,Ba
 
0.5
)
 
4-7
[Al
 
4-7
Si
 
12-9
O
 
32
.
 
 12H2O
9.GC.10Phillipsite-K
(K,Na,Ca
 
0.5
,Ba
 
0.5
)
 
4-7
[Al
 
4-7
Si
 
12-9
O
 
32
]
.
 
 12H
 
2
O
9.GC.10Phillipsite-Na
(Na,K,Ca
 
0.5
,Ba
 
0.5
)
 
4-7
[Al
 
4-7
Si
 
12-9
O
 
32
] · 12H
 
2
O
9.GC.15Merlinoite
(K,Na)
 
5
(Ca,Ba)
 
2
Al
 
9
Si
 
23
O
 
64
·23H
 
2
O
9.GC.20Mazzite-Mg
K
 
2
Mg
 
2
Ca
 
1.5
Al
 
9.5
Si
 
26.5
O
 
72
·28H
 
2
O or near
9.GC.20Mazzite-Na
Na
 
4
[Al
 
4
Si
 
14
O
 
36
]
 
2
 · 30H
 
2
O
9.GC.25Perlialite
K
 
9
Na(Ca,Sr)[Al
 
2
Si
 
4
O
 
12
]
 
6
 · 15H
 
2
O
9.GC.30Boggsite
Ca
 
8
Na
 
3
(Si,Al)
 
96
O
 
192
·70H
 
2
O
9.GC.35Paulingite-Ca
(Ca,K
 
2
,Na
 
2
,Ba)
 
5
[Al
 
10
Si
 
35
O
 
90
] · 45H
 
2
O
9.GC.35Paulingite-K
(K
 
2
,Ca,Na
 
2
,Ba)
 
5
[Al
 
10
Si
 
35
O
 
90
] · 45H
 
2
O

Other Names for Flörkeite

Synonyms:
IMA2008-036Unnamed (Triclinic "phillipsite")
Other Languages:
German:Flörkeit

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 Flörkeite

Reference List:Kolitsch, U. & Blass, G. (2005): Triclinic "phillipsite" in a Ca-rich xenolith from the Bellerberg, Eifel, Germany: reduction of symmetry due to nearly complete Al-Si ordering - evidence for an unusual cooling history? Mitt. Österr. Mineral. Ges. 151, 66.

C. Lengauer, U. Kolitsch, E. Tillmanns (2008): More data on (Na,K,Ca)6[Al8Si8O32]•12H2O, a new triclinic phillipsite-type zeolite from the Bellerberg volcano, Eifel, Germany. Annual Meeting of the DMG, Berlin, Germany, September 14-17, 2008; CD with abstracts, Abs. no. 348.

G. Blass, H.-W. Graf, U. Kolitsch and D. Sebold (2009): The new finds from the volcanic Eifel (II). Mineralien-Welt 20 (2), 38-49. (in German)

C. L. Lengauer, U. Kolitsch, E. Tillmanns (2009): Flörkeite, K3Ca2Na[Al8Si8O32]•12H2O, a new phillipsite-type zeolite from the Bellerberg, East Eifel volcanic area, Germany. Eur. J. Mineral. 21, 901-913.

Internet Links for Flörkeite

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    Localities for Flörkeite

    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.
    Germany
     
    • Rhineland-Palatinate
      • Eifel Mts
        • Mayen
          • Ettringen
            • Bellerberg volcano
              • Ettringer Bellerberg Mt. (Bellberg Mt.; Bellenberg Mt.; Billenberg Mt.; Boilenberg Mt.)
    		Kolitsch, U. & Blass, G. (2005): Triclinic "phillipsite" in a Ca-rich xenolith from the Bellerberg, Eifel, Germany: reduction of symmetry due to nearly complete Al-Si ordering - evidence for an unusual cooling history? Mitt. Österr. Mineral. Ges. 151, 66; C. Lengauer, U. Kolitsch, E. Tillmanns (2008): More data on (Na,K,Ca)6[Al8Si8O32]•12H2O, a new triclinic phillipsite-type zeolite from the Bellerberg volcano, Eifel, Germany. Annual Meeting of the DMG, Berlin, Germany, September 14-17, 2008; CD with abstracts, Abs. no. 348; G. Blass, H.-W. Graf, U. Kolitsch and D. Sebold (2009): The new finds from the volcanic Eifel (II). Mineralien-Welt 20 (2), 38-49. (in German); C. L. Lengauer, U. Kolitsch, E. Tillmanns (2009): Flörkeite, K3Ca2Na[Al8Si8O32].12H2O, a new phillipsite-type zeolite from the Bellerberg, East Eifel volcanic area, Germany. Eur. J. Mineral. 21, 901-913.
    Mineral and/or Locality
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