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Mongolite

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Formula:
Ca
 
4
Nb
 
6
Si
 
5
O
 
24
(OH)
 
10
· nH
 
2
O
System:TetragonalHardness:2
Name:
Named after the country of origin.
This page provides mineralogical data about Mongolite.

Classification of Mongolite

IMA status:Approved
Strunz 8th edition ID:8/B.15-10
Nickel-Strunz 10th (pending) edition ID:9.HF.05

9 : SILICATES (Germanates)
H : Unclassified silicates
F : With Nb, Ta, Zr
Dana 8th edition ID:56.2.4.15

56 : SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
2 : Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination
Hey's CIM Ref.:17.8.5

17 : Silicates Containing other Anions
8 : Silicates with niobate or tantalate
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Type Occurrence of Mongolite

Type Locality:Dorozhnyi pegmatite, Khan Bogdo Massif (Khan-Bogdinskii), Gobi Desert, Mongolia
Year of Discovery:1985

Physical Properties of Mongolite

Hardness (Mohs):2

Crystallography of Mongolite

Crystal System:Tetragonal
Cell Parameters:a = 7Å, c = 29.01Å
Ratio:a:c = 1 : 4.144
Unit Cell Volume:V 1,421.49 ų (Calculated from Unit Cell)

Optical Data of Mongolite

Type:Uniaxial (-)
RI values: nω = 1.800 nε = 1.740
Maximum Birefringence:δ = 0.060

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

Chemical Properties of Mongolite

Formula:
Ca
 
4
Nb
 
6
Si
 
5
O
 
24
(OH)
 
10
· nH
 
2
O
Simplified for copy/paste:Ca4Nb6Si5O24(OH)10·nH2O
Essential elements:Ca, H, Nb, O, Si
All elements listed in formula:Ca, H, Nb, O, Si
Common Impurities:Ti,Al,Mn,Zn,Mg,Sr,Ba,Na,K

Relationship of Mongolite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.HF.10Loudounite
NaCa
 
5
Zr
 
4
Si
 
16
O
 
40
(OH)
 
11
· 8H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
17.8.1Epistolite
Na
 
2
(Nb,Ti)
 
2
(Si
 
2
O
 
7
)O
 
2
· nH
 
2
O
17.8.2Murmanite
Na
 
2
Ti
 
2
(Si
 
2
O
 
7
)O
 
2
· 2H
 
2
O
17.8.3Perraultite
BaNaMn
2+
4
Ti
 
2
(Si
 
2
O
 
7
)
 
2
O
 
2
(OH)
 
2
F
17.8.4Niocalite
(Ca,Nb)
 
4
(Si
 
2
O
 
7
)(O,OH,F)
 
2
17.8.6Fersmanite
Ca
 
4
(Na,Ca)
 
4
(Ti,Nb)
 
4
(Si
 
2
O
 
7
)
 
2
O
 
8
F
 
3
17.8.7Nacareniobsite-(Ce)
Na
 
3
Ca
 
3
(Ce,La,Nd)Nb(Si
 
2
O
 
7
)
 
2
OF
 
3
17.8.8Nenadkevichite
(Na,◻)
 
8
Nb
 
4
(Si
 
4
O
 
12
)
 
2
(O,OH)
 
4
· 8H
 
2
O
17.8.9Natrokomarovite
(Na,Ca,H)
 
2
Nb
 
2
Si
 
2
O
 
10
(OH,F)
 
2
· H
 
2
O
17.8.10Wöhlerite
NaCa
 
2
(Zr,Nb)(Si
 
2
O
 
7
)(O,OH,F)
 
2
17.8.11Belkovite
Ba
 
3
(Nb,Ti)
 
6
(Si
 
2
O
 
7
)
 
2
O
 
12
17.8.12Baotite
Ba
 
4
(Ti,Nb)
 
8
Si
 
4
O
 
28
Cl
17.8.13Shcherbakovite
(K,Ba)KNa(Ti,Nb)
 
2
(Si
 
4
O
 
12
)O
 
2
17.8.14Ilímaussite-(Ce)
(Na,K)
 
7-8
(Ba,K)
 
10
Ce
 
5
(Nb,Ti)
 
6
(Si
 
3
O
 
9
)
 
4
(Si
 
9
O
 
18
)O
 
6
(O,OH)
 
24
17.8.15Komarovite
(Ca,Mn)Nb
 
2
[O
 
3
|Si
 
2
O
 
7
] · 3.5H
 
2
O
17.8.16Manganbelyankinite
(Mn,Ca)(Ti,Nb)
 
5
O
 
12
· 9H
 
2
O
17.8.17Niobophyllite
(K,Na)
 
3
(Fe,Mn)
 
6
(Nb,Ti)
 
2
Si
 
8
(O,OH,F)
 
31
17.8.18Caesium-Kupletskite

Other Names for Mongolite

Synonyms:
IMA1983-027
Other Languages:
German:Mongolit
Spanish:Mongolita

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 Mongolite

Reference List:

- +
American Mineralogist (1986): 71: 1279.

Internet Links for Mongolite

Search Engines:
  • Look for Mongolite on Google
  • Look for Mongolite images on Google
  • External Links:
  • Look for Mongolite on Webmineral
  • Look for Mongolite on Athena Mineralogy
  • Look for Mongolite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mongolite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Localities for Mongolite

    (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.
    Mongolia
     
    • Gobi Desert
      • Khan Bogdo Massif (Khan-Bogdinskii)
    Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (Proceedings of the Russian Mineralogical Society) (and Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva) (1985): 114, 374-377.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    Pekov, I.V. & Podlesnyi, A.S. (2004): Kukisvumchorr Deposit: Mineralogy of Alkaline Pegmatites and Hydrotermalites. Mineralogical Almanac, vol. 7, 140 pages + xxiv photo's pages
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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