Wohlerite Mineral Data + 
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- 56.2.4.1 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m
- 56.2.4.2 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m
- 56.2.4.3 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m
- 56.2.4.4 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m
- 56.2.4.5 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m
- 56.2.4.6 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m
- 56.2.4.7 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1
- 56.2.4.8 Rosenbuschite (Ca,Na)3(Zr,Ti)Si2O8F P1 1
- 56.2.4.9 Hainite Na4Ca8(Ti,Zr,Mn,Fe)3Si8O28F8 P1 1
- 56.2.4.10 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m
- 56.2.4.11 Jennite Ca9Si6O18(OH)6·8H2O P1 1
- 56.2.4.12 Komarovite (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2·3.5(H2O) Unk Ortho
- 56.2.4.13 Na-komarovite? Na6CaNb6[Si4O12F2·4(H2O) C mmm 2/m 2/m 2/m
- 56.2.4.14 Suolunite Ca2Si2O5(OH)2·(H2O) F dd2 mm2
- 56.2.4.15 Mongolite Ca4Nb6Si5O24(OH)10·5(H2O) Unk Tetra
- 56.2.4.16 Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1
- 56.2.4.17 Kochite! Na2(Na,Ca)4Ca4(Mn,Ca)2Zr2Ti2(Si2O7)4(O,F)4F4 P1 1
- VIII/C.11-05 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m
- VIII/C.11-10 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m
- VIII/C.11-12 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m
- VIII/C.11-15 Normandite! NaCa(Mn,Fe)(Ti,Nb,Zr)Si2O7(O,F)2 P 21/a 2/m
- VIII/C.11-20 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m
- VIII/C.11-25 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m
- VIII/C.11-30 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m
- VIII/C.11-40 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m
- VIII/C.11-50 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1
General Wohlerite Information |
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 Chemical Formula: |
NaCa2(Zr,Nb)Si2O7(O,OH,F)2 | ||
| 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 | |||
| Empirical Formula: |
Na(OH)Ca1.9Zr0.5Nb0.4Si2O7.7F0.6 | ||
| Environment: |
Late phase in alkalic pegmatites, accessory mineral in nepheline syenites, in fenites associated with alkaline intrusives, and in carbonatites. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1843 | ||
| Locality: |
Islands in the Langesundsfjord, aroung Brevik, and at Tvedalen, Norway. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Friedrich Wohler (1800-1882), German chemist, Gottingen, Germay. | ||
| Synonym: |
Woehlerite | ||
Wohlerite Image | |||
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Images:
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Wohlerite Crystallography |
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| Axial Ratios: |
a:b:c =1.0526:1:0.7076 | ||
| Cell Dimensions: |
a = 10.8, b = 10.26, c = 7.26, Z = 4; beta = 108.95° V = 760.87 Den(Calc)= 3.45 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.839(1), 2.998(0.7), 3.25(0.6), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Wohlerite |
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| Cleavage: |
[010] Distinct, [100] Poor, [110] Poor | ||
| Color: |
Yellow, Dark yellow, Gray, Brown. | ||
| Density: |
3.42 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Fracture: |
Brittle - Splintery - Brittle fracture leaving splintery fragments. | ||
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. | ||
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | ||
| Habit: |
Tabular - Form dimensions are thin in one direction. | ||
| Hardness: |
5.5-6 - Knife Blade-Orthoclase | ||
| Luminescence: |
Non-fluorescent. | ||
| Luster: |
Vitreous - Greasy | ||
| Streak: |
pale yellow | ||
Optical Properties of Wohlerite |
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| 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 |
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| 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. | ||
| Pleochroism (x): |
nearly colorless. | ||
| Pleochroism (y): |
pale yellow. | ||
| Pleochroism (z): |
wine yellow. | ||
Calculated Properties of Wohlerite |
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| Electron Density: |
relectron=3.32 gm/cc |
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| Fermion Index |
Fermion Index = 0.02031 Boson Index = 0.97969 |
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| Photoelectric: |
PEWohlerite = 32.46 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Wohlerite is Not Radioactive |
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Wohlerite Classification |
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| Dana Class: |
56.2.4.5 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O | ||
| (56.2)with cations in [4] and/or >[4] coordination | |||
| (56.2.4)Cuspidine - Wohlerite group | |||
| Strunz Class: |
VIII/C.11-10 VIII - Silicates | ||
| VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F] | |||
| VIII/C.11 - Wöhlerite - Lavenite series | |||
Other Wohlerite Information |
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| References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2) | ||
| 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 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (MinSocAm) 9 -Handbook of Mineralogy (UofA) 10 -MinDAT 11 -MinMax(Deutsch) 12 -MinMax(English) 13 -Mineralienatlas (Deutsch) 14 -QUT Mineral Atlas 15 - WWW-MINCRYST 16 -École des Mines de Paris Search for Wohlerite using: Visit our Advertisers for Wohlerite : Translate Wohlerite Mineral Data : Ask about Wohlerite here : Print or Cut-and-Paste your Wohlerite Specimen Label here :
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