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Witherite Mineral Data + |
General Witherite Information |
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| BaCO3 | |||
| Molecular Weight = 197.34 gm | |||
| Barium 69.59 % Ba 77.70 % BaO | |||
| Carbon 6.09 % C 22.30 % CO2 | |||
| Oxygen 24.32 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Ba(CO3) | |||
| Low-temperature hydrothermal veins. | |||
| Valid Species (Pre-IMA) 1790 | |||
| Alston Moor, Cumberland, England. Link to MinDat.org Location Data. | |||
| Named after William Withering (1741-1799). English physician and mineralogist. | |||
| ICSD 15196 | |||
| PDF 45-1471 | |||
Witherite Image | |||
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Witherite Crystallography |
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| a:b:c =0.5966:1:0.7221 | |||
| a = 5.313, b = 8.904, c = 6.43, Z = 4; V = 304.18 Den(Calc)= 4.31 | |||
| Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmcn | |||
| By Intensity(I/Io): 3.72(1), 3.68(0.53), 2.15(0.28), | |||
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Physical Properties of Witherite |
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| [010] Distinct | |||
| Colorless, Milky white, Grayish white, Pale yellowish white, Pale brownish white. | |||
| 4.3 | |||
| Subtransparent to translucent | |||
| Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces. | |||
| Columnar - Forms columns | |||
| Pseudo Hexagonal - Crystals show a hexagonal outline. | |||
| Reniform - "Kidney like" in shape (e.g.. hematite). | |||
| 3-3.5 - Calcite-Copper Penny | |||
| Fluorescent phosphorescent, Short UV=bluish white, Long UV=bluish white. | |||
| Vitreous (Glassy) | |||
| white | |||
Optical Properties of Witherite |
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| CI meas= 0.004 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.007 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1456,KPDmeas= 0.1459,KC= 0.1465 |
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| Biaxial (-), a=1.529, b=1.676, g=1.677, bire=0.1480, 2V(Calc)=8, 2V(Meas)=16. Dispersion relatively weak. | |||
Calculated Properties of Witherite |
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relectron=3.75 gm/cc |
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| Fermion Index = 0.12481 Boson Index = 0.87519 |
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PEWitherite = 320.10 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Witherite is Not Radioactive |
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Witherite Classification |
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| 14.1.3.2 (14)Anhydrous Carbonates | |||
| (14.1)with Simple Formula A+ CO3 | |||
| (14.1.3)Aragonite Group (Orthorhombic: Pmcn) | |||
| V/B.04-30 V - Nitrates, Carbonates and Borates | |||
| V/B - Waterfree carbonates [CO3]2- without unfamiliar anions | |||
| V/B.04 - Aragonite group | |||
Other Witherite Information |
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| NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68) | |||
| Links to other databases for Witherite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 -Google Images 8 -Google Scholar 9 -Handbook of Mineralogy (UofA) 10 - HyperPhysics 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 - Mineral and Gemstone Kingdom 15 -Mineralienatlas (Deutsch) 16 -QUT Mineral Atlas 17 -University of Colorado - Mineral Structure Data 18 - WWW-MINCRYST 19 -École des Mines de Paris Search for Witherite using: Visit our Advertisers for Witherite : Translate Witherite Mineral Data : Ask about Witherite here : Print or Cut-and-Paste your Witherite Specimen Label here :
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