Mineralogy Database

Wohlerite Mineral Data

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General Wohlerite Information

Help on Chemical  Formula: Chemical Formula: NaCa2(Zr,Nb)Si2O7(O,OH,F)2
Help on Composition: Composition: Molecular Weight = 395.27 gm
   Sodium      5.82 %  Na    7.84 % Na2O
   Calcium    19.26 %  Ca   26.96 % CaO
   Zirconium  11.54 %  Zr   15.59 % ZrO2
   Niobium     9.40 %  Nb   13.45 % Nb2O5
   Iron        1.41 %  Fe    1.82 % FeO
   Silicon    14.21 %  Si   30.40 % SiO2
   Hydrogen    0.26 %  H     2.28 % H2O
   Oxygen     35.22 %  O
   Fluorine    2.88 %  F     2.88 % F
                -   %   F    -1.21 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na(OH)Ca1.9Fe2+0.1Zr0.5Nb0.4Si2O7.7F0.6
Help on Environment: Environment: Late phase in alkalic pegmatites, accessory mineral in nepheline syenites, in fenites associated with alkaline intrusives, and in carbonatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1843
Help on Locality: Locality: Islands in the Langesundsfjord, aroung Brevik, and at Tvedalen, Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Friedrich Wohler (1800-1882), German chemist, Gottingen, Germay.
Help on Name Pronunciation: Name Pronunciation: Wohlerite + Pronunciation Say WOHLERITE
Help on Synonym: Synonym: Woehlerite
 

Wohlerite Image

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  Wohlerite   Biotite

Comments: Prismatic wohlerite crystals with lepidomelane (Fe-rich biotite).
Location: Langevannet, Tvedalen, Telemark, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Ferro-edenite   Wohlerite

Comments: Transparent yellow wöhlerite crystals embedded in pink feldspar and black mica matrix with black ferro-edenite (var. barkevikite).
Location: Langesundsfjorden, Sandoya Island, Porsgrunn, Norway. Scale: Specimen Size: 5x5x3.5 cm.
© John Betts - Fine Minerals

Wohlerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0526:1:0.7076
Help on Cell Dimensions: Cell Dimensions: a = 10.8, b = 10.26, c = 7.26, Z = 4; beta = 108.95° V = 760.87 Den(Calc)= 3.45
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.839(1), 2.998(0.7), 3.25(0.6),
 

Physical Properties of Wohlerite

Help on Cleavage: Cleavage: {010} Distinct, {100} Poor, {110} Poor
Help on Color: Color: Yellow, Dark yellow, Gray, Brown.
Help on Density: Density: 3.42
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Splintery - Brittle fracture leaving splintery fragments.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: pale yellow
 

Optical Properties of Wohlerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2075,KPDmeas= 0.2093,KC= 0.2162
Ncalc = 1.74 - 1.75
Help on Optical Data: Optical Data: Biaxial (-), a=1.7-1.705, b=1.716-1.72, g=1.726-1.728, bire=0.0230-0.0260, 2V(Calc)=70-76, 2V(Meas)=70-77. Dispersion r > v weak.
Help on Pleochroism (x): Pleochroism (x): nearly colorless.
Help on Pleochroism (y): Pleochroism (y): pale yellow.
Help on Pleochroism (z): Pleochroism (z): wine yellow.
 

Calculated Properties of Wohlerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.32 gm/cc
note: Specific Gravity of Wohlerite =3.42 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEWohlerite = 32.46 barns/electron
U=PEWohlerite x rElectron Density= 107.86 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wohlerite is Not Radioactive
 

Wohlerite Classification

Help on  Dana Class: Dana Class: 56.02.04.05 (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 Wohlerite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Wohlerite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

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

Wohlerite

NaCa2(Zr,Nb)Si2O7(O,OH,F)2
Dana No: 56.02.04.05 Strunz No: 09.BE.17
Locality:

 

Notes:

 

 
   
 


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