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Mongolite Mineral Data

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General Mongolite Information

Help on Chemical  Formula: Chemical Formula: Ca4Nb6Si5O24(OH)10•5(H2O)
Help on Composition: Composition: Molecular Weight = 1,502.31 gm
   Calcium   10.67 %  Ca   14.93 % CaO
   Niobium   37.11 %  Nb   53.08 % Nb2O5
   Silicon    9.35 %  Si   20.00 % SiO2
   Hydrogen   1.34 %  H    11.99 % H2O
   Oxygen    41.53 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca4Nb6Si5O24(OH)10•5(H2O)
Help on Environment: Environment: Agpaitic pegmatites in alkalic granite.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Khan-Bogdinsky massif, Gobi desert, Mongolia, China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Name Pronunciation: Name Pronunciation: Mongolite + Pronunciation Say MONGOLITE
 

Mongolite Image

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  Mongolite

Comments: White to pinkish massive mongolite.
Location: Khan-Bogdinskii massif, Gobi Desert, Mongolia. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Mongolite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:4.14428
Help on Cell Dimensions: Cell Dimensions: a = 7, c = 29.01, Z = 2; V = 1,421.49 Den(Calc)= 3.51
Help on Crystal System: Crystal System: Tetragonal Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.163(1), 2.974(0.7), 3.087(0.65),
 

Physical Properties of Mongolite

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: Gray lilac, Light violet.
Help on Density: Density: 3.147 - 3.15, Average = 3.14
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Foliated - Two dimensional platy forms.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Silky
Help on Streak: Streak: white
 

Optical Properties of Mongolite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.045 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.143 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2194,KPDmeas= 0.2446,KC= 0.256
Ncalc = 1.81 - 1.9
Help on Optical Data: Optical Data: Uniaxial (-), e=1.74, w=1.8, bire=0.0600.
 

Calculated Properties of Mongolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.05 gm/cc
note: Specific Gravity of Mongolite =3.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0047106809
Boson Index = 0.9952893191
Help on Photoelectric: Photoelectric: PEMongolite = 55.88 barns/electron
U=PEMongolite x rElectron Density= 170.53 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mongolite is Not Radioactive
 

Mongolite Classification

Help on  Dana Class: Dana Class: 56.02.04.15 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.04)Cuspidine - Wohlerite group
 
56.02.04.01 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m
 
56.02.04.02 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m
 
56.02.04.03 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m
 
56.02.04.04 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m
 
56.02.04.05 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m
 
56.02.04.06 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m
 
56.02.04.07 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1
 
56.02.04.08 Rosenbuschite (Ca,Na)3(Zr,Ti)Si2O8F P1 1
 
56.02.04.09 Hainite Na4Ca8(Ti,Zr,Mn,Fe)3Si8O28F8 P1 1
 
56.02.04.10 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m
 
56.02.04.11 Jennite Ca9Si6O18(OH)6•8H2O P1 1
 
56.02.04.12 Komarovite (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2•3.5(H2O) Unk Ortho
 
56.02.04.13 Natrokomarovite* Na6CaNb6[Si4O12F2•4(H2O) C mmm 2/m 2/m 2/m
 
56.02.04.14 Suolunite Ca2Si2O5(OH)2•(H2O) F dd2 mm2
 
56.02.04.15 Mongolite Ca4Nb6Si5O24(OH)10•5(H2O) Unk Tetra
 
56.02.04.16 Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1
 
56.02.04.17 Kochite! Na2(Na,Ca)4Ca4(Mn,Ca)2Zr2Ti2(Si2O7)4(O,F)4F4 P1 1
 
56.02.04.18 Marianoite! Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4 P 21 2/m
Help on  Strunz Class: Strunz Class: 09.HF.05 09 - SILICATES (Germanates)
  09.H - Unclassified Silicates
  09.HF -With Nb, Ta, Zr
 
09.HF.05 Mongolite Ca4Nb6Si5O24(OH)10•5(H2O) Unk Tetra
 

Other Mongolite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Mongolite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Mongolite Specimen Label here :

Mongolite

Ca4Nb6Si5O24(OH)10•5(H2O)
Dana No: 56.02.04.15 Strunz No: 09.HF.05
Locality:

 

Notes:

 

 
   
 


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