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Gjerdingenite-Ca

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Formula:
K
 
2
Ca(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
System:Monoclinic
Member of:Nenadkevichite Subgroup > Labuntsovite Group


Labuntsovite Group.

Classification of Gjerdingenite-Ca

IMA status:Approved 2005
Strunz 8th edition ID:8/E.07-
Nickel-Strunz 10th (pending) edition ID:9.CE.30c

9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
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Type Occurrence of Gjerdingenite-Ca

Type Locality:Natrolite Stock (Pegmatite No. 61), Karnasurt Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

Crystallography of Gjerdingenite-Ca

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m {B1 1 2/m} {C2/m} {C1 2/m 1}
Cell Parameters:a = 14.6365Å, b = 14.2049Å, c = 7.8919Å
β = 117.467°
Ratio:a:b:c = 1.03 : 1 : 0.556
Unit Cell Volume:V 1,455.85 ų (Calculated from Unit Cell)

Chemical Properties of Gjerdingenite-Ca

Formula:
K
 
2
Ca(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
Essential elements:Ca, H, K, Nb, O, Si
All elements listed in formula:Ca, H, K, Nb, O, Si, Ti

Relationship of Gjerdingenite-Ca to other Species

Member of:Nenadkevichite Subgroup > Labuntsovite Group
Other Members of Group:

- +
Alsakharovite-Zn
NaSrKZn(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 7H
 
2
O
Burovaite-Ca
(Na,K)
 
4
Ca
 
2
(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(OH,O)
 
8
 · 12H
 
2
O
Gjerdingenite-Fe
K
 
2
Fe
2+
 
(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
Gjerdingenite-Mn
K
 
2
Mn
2+
 
(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
Gjerdingenite-Na
K
 
2
Na
 
2
(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(OH,O)
 
4
 · 5H
 
2
O
Nenadkevichite
(Na,◻)
 
8
Nb
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 8H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
9.CE.05Papagoite
CaCu[H
 
3
AlSi
 
2
O
 
9
]
9.CE.10Verplanckite
Ba
 
2
(Mn,Fe,Ti)Si
 
2
O
 
6
(O,OH,Cl,F)
 
2
 · 3H
 
2
O or near
9.CE.15Baotite
Ba
 
4
(Ti,Nb)
 
8
Si
 
4
O
 
28
Cl
9.CE.20Nagashimalite
Ba
 
4
(V,Ti)
 
4
B
 
2
Si
 
8
O
 
27
(O,OH)
 
2
Cl
9.CE.20Taramellite
Ba
 
4
(Fe
3+
 
,Ti,Fe
2+
 
,Mg)
 
4
(B
 
2
Si
 
8
O
 
27
)O
 
2
Cl
 
x
9.CE.20Titantaramellite
Ba
 
4
(Ti,Fe
3+
 
,Fe
2+
 
,Mg)
 
4
(B
 
2
Si
 
8
O
 
27
)O
 
2
Cl
 
x
9.CE.25Bario-orthojoaquinite
(Ba,Sr)
 
4
Fe
 
2
Ti
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
 · H
 
2
O
9.CE.25Byelorussite-(Ce)
NaBa
 
2
Ce
 
2
MnTi
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(F,OH) · H
 
2
O
9.CE.25Joaquinite-(Ce)
NaBa
 
2
Ce
 
2
FeTi
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(OH,F) · H
 
2
O
9.CE.25Orthojoaquinite-(Ce)
NaBa
 
2
Ce
 
2
FeTi
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(O,OH) · H
 
2
O
9.CE.25Strontiojoaquinite
Sr
 
2
Ba
 
2
(Na,Fe)
 
2
Ti
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(O,OH)
 
2
 · H
 
2
O
9.CE.25Strontio-orthojoaquinite
(Na,Fe)
 
2
Sr
 
2
Ba
 
2
Ti
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(O,OH)
 
2
 · H
 
2
O
9.CE.25Orthojoaquinite-(La)
NaBa
 
2
La
 
2
Fe
2+
 
Ti
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(O,OH) · H
 
2
O
9.CE.30eLabuntsovite-Mn
Na
 
4
K
 
4
(Ba,K)
 
2
Mn
2+
 
(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(O,OH)
 
8
 · 10-12H
 
2
O
9.CE.30aNenadkevichite
(Na,◻)
 
8
Nb
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 8H
 
2
O
9.CE.30dLemmleinite-K
K
 
2
(Ti,Nb)
 
2
(Si
 
4
O
 
12
)(OH,O)
 
2
 · 4H
 
2
O
9.CE.30aKorobitsynite
Na
 
2
(Ti,Nb)
 
2
(Si
 
4
O
 
12
)(OH,O)
 
2
 · 3-4H
 
2
O
9.CE.30cKuzmenkoite-Mn
K
 
2
Mn
2+
 
(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(OH,O)
 
4
 · 5H
 
2
O
9.CE.30bVuoriyarvite-K
K
 
2
(Nb,Ti)
 
2
(Si
 
4
O
 
12
)(O,OH)
 
2
 · 4H
 
2
O
9.CE.30bTsepinite-Na
Na
 
2
(Ti,Nb)
 
2
(Si
 
4
O
 
12
)(OH,O)
 
2
 · 3H
 
2
O
9.CE.30cKarupmøllerite-Ca
(Na,Ca,K)
 
2
Ca(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 7H
 
2
O
9.CE.30eLabuntsovite-Mg
Na
 
4
K
 
4
(Ba,K)
 
2
Mg(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(O,OH)
 
8
 · 10H
 
2
O
9.CE.30eLabuntsovite-Fe
Na
 
4
K
 
4
(Ba,K)
 
2
Fe
2+
 
(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(O,OH)
 
8
 · 10H
 
2
O
9.CE.30dLemmleinite-Ba
Na
 
2
K
 
2
Ba(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 5H
 
2
O
9.CE.30cGjerdingenite-Fe
K
 
2
Fe
2+
 
(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
9.CE.30hNeskevaaraite-Fe
K
 
3
Na
 
2
Fe
2+
 
(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 5-6 H
 
2
O
9.CE.30bTsepinite-K
K
 
2
(Ti,Nb)
 
2
(Si
 
4
O
 
12
)(OH,O)
 
2
 · 3H
 
2
O
9.CE.30bParatsepinite-Ba
Ba
 
4
(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(OH,O)
 
8
 · 8H
 
2
O
9.CE.30bTsepinite-Ca
Ca(Ti,Nb)
 
2
(Si
 
4
O
 
12
)(OH,O)
 
2
 · 3H
 
2
O
9.CE.30hAlsakharovite-Zn
NaSrKZn(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 7H
 
2
O
9.CE.30cGjerdingenite-Mn
K
 
2
Mn
2+
 
(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
9.CE.30cLepkhenelmite-Zn
(Ba,K)
 
2
Zn(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 7H
 
2
O
9.CE.30bTsepinite-Sr
Sr(Ti,Nb)
 
2
(Si
 
4
O
 
12
)(OH,O)
 
2
 · 3H
 
2
O
9.CE.30bParatsepinite-Na
(Na,Sr,K,Ca)
 
7
(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(O,OH)
 
8
·nH
 
2
O n ~ 8
9.CE.30fParalabuntsovite-Mg
Na
 
8
K
 
8
Mg
 
8
Ti
 
16
(Si
 
4
O
 
12
)
 
8
(O,OH)
 
16
· nH
 
2
O
9.CE.30cGjerdingenite-Na
K
 
2
Na
 
2
(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(OH,O)
 
4
 · 5H
 
2
O
9.CE.30hGutkovaite-Mn
K
 
2
CaMn(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 5H
 
2
O
9.CE.30cKuzmenkoite-Zn
K
 
2
Zn(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(OH,O)
 
4
·6-8H
 
2
O
9.CE.30gOrganovaite-Mn
K
 
2
Mn(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
9.CE.30gOrganovaite-Zn
K
 
2
Zn(Nb,Ti)
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
 · 6H
 
2
O
9.CE.30gParakuzmenkoite-Fe
(K,Ba)
 
4
Fe(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(O,OH)
 
8
 · 14H
 
2
O
9.CE.30cBurovaite-Ca
(Na,K)
 
4
Ca
 
2
(Ti,Nb)
 
8
(Si
 
4
O
 
12
)
 
4
(OH,O)
 
8
 · 12H
 
2
O
9.CE.45Komarovite
(Ca,Mn)Nb
 
2
[O
 
3
|Si
 
2
O
 
7
] · 3.5H
 
2
O
9.CE.45Natrokomarovite
(Na,Ca,H)
 
2
Nb
 
2
Si
 
2
O
 
10
(OH,F)
 
2
 · H
 
2
O

Other Names for Gjerdingenite-Ca

Synonyms:
IMA2005-029
Other Languages:
Russian:Гьердингенит-Ca

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 Gjerdingenite-Ca

Reference List:

- +
Yamnova, N. A.; Pekov, I. V.; Kabalov, Yu. K.; Chukanov, N. V.; Schneider, J. (2007): Crystal structures of gjerdingenite-Ca and gjerdingenite-Na, new minerals of the labuntsovite group. Doklady Chemistry 414, 109-114.

Internet Links for Gjerdingenite-Ca

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    • Localities for Gjerdingenite-Ca

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    (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.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Lovozero Massif
            • Karnasurt Mt
    		IMA website
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