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Labuntsovite Group

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Aris Quarries (Ariskop Quarry; Railway Quarry), Aris, Windhoek, Windhoek District, Khomas Region, Namibia
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Show Labuntsovite Group Photos (9)


A very large group of porous titano- and niobosilicates (monoclinic, pseudo-orthorhombic or orthorhombic).
Seven subgroups are distinguished, each corresponding to different structure types (Chukanov et al., 2002).

One of these is the Nenadkevichite Subgroup which comprises the orthorhombic members.

Classification of Labuntsovite Group

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Relationship of Labuntsovite Group to other Species

Minerals in 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-Ca:
K
 
2
Ca(Nb,Ti)
 
4
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
2
 · 6H
 
2
O
Gjerdingenite-Fe:
K
 
2
Fe
2+
 
(Nb,Ti)
 
4
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
2
 · 6H
 
2
O
Gjerdingenite-Mn:
K
 
2
Mn
2+
 
(Nb,Ti)
 
4
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
2
 · 6H
 
2
O
Gjerdingenite-Na:
K
 
2
Na
 
2
(Nb,Ti)
 
4
[(OH,O)
 
2
|Si
 
4
O
 
12
]
 
2
 · 5H
 
2
O
Gutkovaite-Mn:
K
 
2
CaMn(Ti,Nb)
 
4
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
2
 · 5H
 
2
O
Karupmøllerite-Ca:
(Na,Ca,K)
 
2
Ca(Nb,Ti)
 
4
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
2
 · 7H
 
2
O
Korobitsynite:
Na
 
2
(Ti,Nb)
 
2
[(OH,O)
 
2
|Si
 
4
O
 
12
] · 3-4H
 
2
O
Kuzmenkoite-Mn:
K
 
2
Mn
2+
 
(Ti,Nb)
 
4
[(OH,O)
 
2
|Si
 
4
O
 
12
]
 
2
 · 5H
 
2
O
Kuzmenkoite-Zn:
K
 
2
Zn(Ti,Nb)
 
4
(Si
 
4
O
 
12
)
 
2
(OH,O)
 
4
·6-8H
 
2
O
Labuntsovite-Fe:
Na
 
4
K
 
4
(Ba,K)
 
2
Fe
2+
 
(Ti,Nb)
 
8
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
4
 · 10H
 
2
O
Labuntsovite-Mg:
Na
 
4
K
 
4
(Ba,K)
 
2
Mg(Ti,Nb)
 
8
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
4
 · 10H
 
2
O
Labuntsovite-Mn:
Na
 
4
K
 
4
(Ba,K)
 
2
Mn
2+
 
(Ti,Nb)
 
8
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
4
 · 10-12H
 
2
O
Lemmleinite-Ba:
Na
 
2
K
 
2
Ba(Ti,Nb)
 
4
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
2
 · 5H
 
2
O
Lemmleinite-K:
K
 
2
(Ti,Nb)
 
2
[(OH,O)
 
2
|Si
 
4
O
 
12
] · 4H
 
2
O
Lepkhenelmite-Zn:
(Ba,K)
 
2
Zn(Ti,Nb)
 
4
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
2
 · 7H
 
2
O
Nenadkevichite:
(Na,[])
 
8
Nb
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
·8H
 
2
O
Neskevaaraite-Fe:
K
 
3
Na
 
2
Fe
2+
 
(Ti,Nb)
 
4
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
2
 · 5-6 H
 
2
O
Organovaite-Mn:
K
 
2
Mn(Nb,Ti)
 
4
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
2
 · 6H
 
2
O
Organovaite-Zn:
K
 
2
Zn(Nb,Ti)
 
4
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
2
 · 6H
 
2
O
Parakuzmenkoite-Fe:
(K,Ba)
 
4
Fe(Ti,Nb)
 
8
[(O,OH)
 
2
|Si
 
4
O
 
12
]
 
4
 · 14H
 
2
O
Paralabuntsovite-Mg:
Na
 
8
K
 
8
Mg
 
8
Ti
 
16
(Si
 
4
O
 
12
)
 
8
(O,OH)
 
16
· n(H
 
2
O)
Paratsepinite-Ba:
Ba
 
4
(Ti,Nb)
 
8
[(OH,O)
 
2
|Si
 
4
O
 
12
]
 
4
 · 8H
 
2
O
Paratsepinite-Na:
(Na,Sr,K,Ca)
 
7
(Ti,Nb)
 
8
[Si
 
4
O
 
12
]
 
4
(O,OH)
 
8
·nH
 
2
O n ~ 8
Tsepinite-Ca:
Ca(Ti,Nb)
 
2
[(OH,O)
 
2
|Si
 
4
O
 
12
] · 3H
 
2
O
Tsepinite-K:
K
 
2
(Ti,Nb)
 
2
[(OH,O)
 
2
|Si
 
4
O
 
12
] · 3H
 
2
O
Tsepinite-Na:
Na
 
2
(Ti,Nb)
 
2
[(OH,O)
 
2
|Si
 
4
O
 
12
] · 3H
 
2
O
Tsepinite-Sr:
Sr(Ti,Nb)
 
2
[(OH,O)
 
2
|Si
 
4
O
 
12
] · 3H
 
2
O
Vuoriyarvite-K:
K
 
2
(Nb,Ti)
 
2
[(O,OH)
 
2
|Si
 
4
O
 
12
] · 4H
 
2
O

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 Labuntsovite Group

Reference List:Chukanov, Nikita V.; Pekov, Igor V.; Rastsvetaeva, Ramiza K.; Nekrasov, Aleksei N. (1999): Labuntsovite: solid solutions and features of the crystal structure. Can. Mineral. 37, 901-910.

Chukanov, Nikita V.; Pekov, Igor V.; Khomyakov, Alexander P. (2002): Recommended nomenclature for labuntsovite-group minerals. European Journal of Mineralogy 14, 165-173.

Armbruster, Th., Krivovichev, S.V., Weber, Th., Gnos, E., Organova, N.N., Yakovenchuk, V.N., Shlyukova, Z.V. (2004): Origin of diffuse superstructure reflections in labuntsovite-group minerals. American Mineralogist, 89, 1655-1666.

Internet Links for Labuntsovite Group

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    Localities for Labuntsovite Group

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