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Nabesite

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Kuannersuit (Kvanefjeld) plateau, Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland
© Thomas Witzke

Formula:
Na
 
2
BeSi
 
4
O
 
10
 * 4 H
 
2
O
System:OrthorhombicColour:colourless to white
Hardness:5 - 6
Name:named for the chemical composition Na, Be, Si
This page provides mineralogical data about Nabesite.

Classification of Nabesite

IMA status:Approved 2000
Strunz 8th edition ID:8/J.0-
Nickel-Strunz 10th (pending) edition ID:9.EA.65

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
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Type Occurrence of Nabesite

Type Locality:Kuannersuit (Kvanefjeld) plateau, Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland
General Appearance of Type Material:platy crystals

Physical Properties of Nabesite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:colourless to white
Streak:white
Hardness (Mohs):5 - 6
Hardness Data:Measured
Cleavage:Distinct/Good
{110} and {001}
Fracture:Irregular/Uneven
Density (measured):2.16 g/cm3
Density (calculated):2.21 g/cm3

Crystallography of Nabesite

Crystal System:Orthorhombic
Class (H-M):2 2 2 - Disphenoidal
Space Group:P21 21 21
Cell Parameters:a = 9.748Å, b = 10.133Å, c = 11.954Å
Ratio:a:b:c = 0.962 : 1 : 1.18
Unit Cell Volume:V 1180.8 ų
Z:4

Optical Data of Nabesite

Type:Biaxial (-)
RI values: nα = 1.499 nβ = 1.507 nγ = 1.511
2V:Measured: 65°
Maximum Birefringence:δ = 0.012

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

Chemical Properties of Nabesite

Formula:
Na
 
2
BeSi
 
4
O
 
10
 * 4 H
 
2
O
All elements listed in formula:Be, H, Na, O, Si

Relationship of Nabesite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EA.05Cuprorivaite
CaCu[Si
 
4
O
 
10
]
9.EA.05Gillespite
BaFe
2+
 
[Si
 
4
O
 
10
]
9.EA.05Effenbergerite
BaCu[Si
 
4
O
 
10
]
9.EA.05Wesselsite
SrCu[Si
 
4
O
 
10
]
9.EA.10Ekanite
(Ca,Fe
2+
 
,Pb)
 
2
(Th,U)[Si
 
8
O
 
20
]
9.EA.15Apophyllite-(KF)
KCa
 
4
[(F,OH)|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.15Apophyllite-(KOH)
KCa
 
4
[(OH,F)|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.15Apophyllite-(NaF)
NaCa
 
4
[F|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.20Magadiite
NaSi
 
7
O
 
13
(OH)
 
3
·3H
 
2
O
9.EA.25Dalyite
K
 
2
ZrSi
 
6
O
 
15
9.EA.25Davanite
K
 
2
TiSi
 
6
O
 
15
9.EA.30Sazhinite-(Ce)
Na
 
3
Ce[Si
 
6
O
 
15
] · 6H
 
2
O
9.EA.30Sazhinite-(La)
Na
 
3
La[Si
 
6
O
 
15
] · 2H
 
2
O
9.EA.35Armstrongite
CaZr[Si
 
6
O
 
15
]·3H
 
2
O
9.EA.40Okenite
CaSi
 
2
O
 
5
·2H
 
2
O
9.EA.45Nekoite
Ca
 
3
Si
 
6
O
 
15
·7H
 
2
O
9.EA.50Cavansite
Ca(VO)Si
 
4
O
 
10
·4H
 
2
O
9.EA.55Pentagonite
Ca(VO)Si
 
4
O
 
10
·4H
 
2
O
9.EA.60Penkvilksite
Na
 
4
Ti
 
2
Si
 
8
O
 
22
·4H
 
2
O
9.EA.60Tumchaite
Na
 
2
Zr(Si
 
4
O
 
11
)·2H
 
2
O
9.EA.70Ajoite
(K,Na)Cu
 
7
[(OH)
 
6
|AlSi
 
9
O
 
24
] · 3H
 
2
O
9.EA.75Zeravshanite
Cs
 
4
Na
 
2
Zr
 
3
[Si
 
18
O
 
45
](H
 
2
O)
 
2
9.EA.80Bussyite-(Ce)
(Ce,REE)
 
3
(Na,H
 
2
O)
 
6
MnSi
 
9
Be
 
5
(O,OH)
 
30
F
 
4
9.EA.85Plumbophyllite
Pb
 
2
Si
 
4
O
 
10
·H
 
2
O

Other Names for Nabesite

Synonyms:
IMA2000-024
Other Languages:
German:Nabesit
Russian:Набесит
Spanish:Nabesita

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 Nabesite

Reference List:Petersen, O.V., G. Giester, F. Brandstätter & G. Niedermayr (2002): Nabesite, Na2BeSi4O10·4H2O, a new mineral species from the Ilimaussaq alkaline complex, south Greenland.- Canadian Mineralogist: 40: 173-181.

Internet Links for Nabesite

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    Localities for Nabesite

    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.
    Greenland
     
    • Kitaa (West Greenland) Province
      • Narsaq
        • Ilimaussaq complex
    		O.V. Petersen et al. (2002) Can. Mineral. 40, 173-181
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 6th Nov 2009 16:38:12