Niocalite Mineral Data

Niocalite Mineral Data
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General Niocalite Information

Help on Chemical Formula: Chemical Formula: Ca14Nb2(Si2O7)4O6F2
Help on Composition: Composition: Molecular Weight = 1,553.57 gm
   Calcium   36.12 %  Ca   50.53 % CaO
   Niobium   11.96 %  Nb   17.11 % Nb2O5
   Silicon   14.46 %  Si   30.94 % SiO2
   Oxygen    35.01 %  O
   Fluorine   2.45 %  F     2.45 % F
               -   %   F    -1.03 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca14Nb2(Si2O7)4O6F2
Help on Environment: Environment: In carbonatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: Oka, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition (Niobium, Calcium).
Help on Name Pronunciation: Name Pronunciation: Niocalite + Pronunciation Say NIOCALITE
Help on Synonym: Synonym: ICSD 31269
  PDF 11-633
 

Niocalite Image

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Niocalite

Comments: Yellowish brown crystal prisms of niocalite in a carbonatite rock matrix.
Location: Oka, Oka complex, Deux-Montagnes Co., Québec, Canada. Scale: Crystal length 1 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Niocalite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.0414:1:0.7065
Help on Cell Dimensions: Cell Dimensions: a = 10.863, b = 10.431, c = 7.37, Z = 1; beta = 110.1° V = 784.25 Den(Calc)= 3.29
Help on Crystal System: Crystal System: Monoclinic - DomaticH-M Symbol (m) Space Group: Pa
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.01(1), 2.85(0.6), 2.89(0.6),
Click Here for Large Niocalite Structure Window Crystal Structure:

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Mellini M , Tschermaks Mineralogische und Petrographische Mitteilungen , 30 (1982) p.249-266, Niocalite revised: Twinning and crystal structure, Note: cuspidine structure, Locality: Oka, Quebec, Canada

 

Physical Properties of Niocalite

Help on Cleavage: Cleavage: None
Help on Color: Color: Light yellow.
Help on Density: Density: 3.32
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Square - Occurs as square crystals in shape or outline.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Niocalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2171,KPDmeas= 0.2152,KC= 0.2175
Ncalc = 1.72
Help on Optical Data: Optical Data: Biaxial (-), a=1.7-1.701, b=1.714-1.721, g=1.72-1.73, bire=0.0200-0.0290, 2V(Calc)=64-66, 2V(Meas)=34-56.
 

Calculated Properties of Niocalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.24 gm/cc
note: Specific Gravity of Niocalite =3.29 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0074096198
Boson Index = 0.9925903802
Help on Photoelectric: Photoelectric: PENiocalite = 22.25 barns/electron
U=PENiocalite x rElectron Density= 72.01 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Niocalite is Not Radioactive
 

Niocalite Classification
Help on Dana Class: Dana Class: 56.02.04.06 (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.BE.17 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
 
09.BE.17 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m
 
09.BE.17 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m
 
09.BE.17 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m
 
09.BE.17 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m
 
09.BE.17 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1
 
09.BE.17 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m
 
09.BE.17 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m
 
09.BE.17 Normandite! NaCa(Mn,Fe)(Ti,Nb,Zr)Si2O7(O,F)2 P 21/a 2/m
 
09.BE.17 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m
 
09.BE.17 Marianoite! Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4 P 21 2/m
 

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

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

Niocalite

Ca14Nb2(Si2O7)4O6F2
Dana No: 56.02.04.06 Strunz No: 09.BE.17
Locality:

 

Notes: