Witherite
A valid IMA mineral species - grandfathered
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About Witherite
Formula:
BaCO3
Colour:
Colourless, white, greyish, light yellow; colourless in transmitted light.
Lustre:
Vitreous, Resinous
Hardness:
3 - 3½
Specific Gravity:
4.289 - 4.293
Crystal System:
Orthorhombic
Member of:
Name:
Named after William Withering (1741-1799), English physician and naturalist, who first described the mineral.
The Ba analogue of strontianite and aragonite.
Found in low-temperature hydrothermal vein deposits.
Compare 'UM1974-03-CO:BaCaMg'.
Note on the type locality:
It was for a long time assumed to be Alston Moor, Eden, Cumbria, but Cotterell (2022) demonstrated that there is "evidence to show that Alston Moor was 'fabricated' as the Type Locality and that the real source was Anglezarke in Lancashire" (https://www.mindat.org/mesg-625213.html).
Found in low-temperature hydrothermal vein deposits.
Compare 'UM1974-03-CO:BaCaMg'.
Note on the type locality:
It was for a long time assumed to be Alston Moor, Eden, Cumbria, but Cotterell (2022) demonstrated that there is "evidence to show that Alston Moor was 'fabricated' as the Type Locality and that the real source was Anglezarke in Lancashire" (https://www.mindat.org/mesg-625213.html).
Visit gemdat.org for gemological information about Witherite.
Unique Identifiers
Mindat ID:
4299
Long-form identifier:
mindat:1:1:4299:0
GUID
(UUID V4):
(UUID V4):
4c61d9bc-bfe1-46b0-9dc5-6bd8198342af
IMA Classification of Witherite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ba(CO3)
First published:
1784
Classification of Witherite
5.AB.15
5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
B : Alkali-earth (and other M2+) carbonates
5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
B : Alkali-earth (and other M2+) carbonates
14.1.3.2
14 : ANHYDROUS NORMAL CARBONATES
1 : A(XO3)
14 : ANHYDROUS NORMAL CARBONATES
1 : A(XO3)
11.5.2
11 : Carbonates
5 : Carbonates of Sr and Ba
11 : Carbonates
5 : Carbonates of Sr and Ba
Mineral Symbols
As of 2021 there are now IMAβCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMAβCNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMAβCNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Wth | IMAβCNMNC | Warr, L.N. (2021). IMAβCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Wth | Kretz (1983) | Kretz, R. (1983) Symbols of rock-forming minerals. American Mineralogist, 68, 277β279. |
Wth | Siivolam & Schmid (2007) | Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download |
Wth | Whitney & Evans (2010) | Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185β187 doi:10.2138/am.2010.3371 |
Wth | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Wth | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261β264 doi:10.1180/clm.2020.30 |
Physical Properties of Witherite
Vitreous, Resinous
Transparency:
Transparent, Translucent
Comment:
resinous on fractures
Colour:
Colourless, white, greyish, light yellow; colourless in transmitted light.
Streak:
White
Hardness:
3 - 3½ on Mohs scale
Cleavage:
Distinct/Good
On {010} distinct; on {110} imperfect. Possibly also on {110} and {112}.
On {010} distinct; on {110} imperfect. Possibly also on {110} and {112}.
Fracture:
Irregular/Uneven
Density:
4.289 - 4.293 g/cm3 (Measured) 4.26(2) g/cm3 (Calculated)
Optical Data of Witherite
Type:
Biaxial (-)
RI values:
nα = 1.529 nβ = 1.676 nγ = 1.677
2V:
Measured: 16° , Calculated: 8°
Max Birefringence:
δ = 0.148
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
relatively weak
Chemistry of Witherite
Mindat Formula:
BaCO3
Elements listed:
CAS Registry number:
Common Impurities:
Ca,Sr
Crystallography of Witherite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 5.314 Å, b = 8.904 Å, c = 6.430 Å
Ratio:
a:b:c = 0.597 : 1 : 0.722
Unit Cell V:
304.24 Γ
Β³ (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals universally twinned on {110}, yielding pseudo-hexagonal dipyramids; also short prismatic [001] or tabular to lenticular with a convex base. Faces commonly rough and horizontally striated. Globular, tuberose, and botryoidal; structure columnar, granular, or coarse fibrous.
Twinning:
On {110}, universal.
Comment:
Space Group: Pmcn (synthetic).
Crystallographic forms of Witherite
Crystal Atlas:
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0000235 | Witherite | de Villiers J P R (1971) Crystal structures of aragonite, strontianite, and witherite American Mineralogist 56 758-767 | 1971 | 0 | 293 | ||
0018857 | Witherite | Ye Y, Smyth J R, Boni P (2012) Crystal structure and thermal expansion of aragonite-group carbonates by single-crystal X-ray diffraction American Mineralogist 97 707-712 | 2012 | Hexham, Northumberland, England | 0 | 300 | |
0006305 | Witherite | Antao S M, Hassan I (2009) The orthorhombic structure of CaCO3, SrCO3, PbCO3 and BaCO3: Linear structural trends The Canadian Mineralogist 47 1245-1255 | 2009 | synthetic | 0 | 293 | |
0006306 | Witherite | Antao S M, Hassan I (2009) The orthorhombic structure of CaCO3, SrCO3, PbCO3 and BaCO3: Linear structural trends The Canadian Mineralogist 47 1245-1255 | 2009 | synthetic | 0 | 293 | |
0008420 | Witherite | Holl C M, Smyth J R, Laustsen H M S, Jacobsen S D, Downs R T (2000) Compression of witherite to 8 GPa and the crystal structure of BaCO3 II Physics and Chemistry of Minerals 27 467-473 | 2000 | 0 | 293 | ||
0008421 | Witherite | Holl C M, Smyth J R, Laustsen H M S, Jacobsen S D, Downs R T (2000) Compression of witherite to 8 GPa and the crystal structure of BaCO3 II Physics and Chemistry of Minerals 27 467-473 | 2000 | 1.26 | 293 | ||
0008422 | Witherite | Holl C M, Smyth J R, Laustsen H M S, Jacobsen S D, Downs R T (2000) Compression of witherite to 8 GPa and the crystal structure of BaCO3 II Physics and Chemistry of Minerals 27 467-473 | 2000 | 1.98 | 293 | ||
0008423 | Witherite | Holl C M, Smyth J R, Laustsen H M S, Jacobsen S D, Downs R T (2000) Compression of witherite to 8 GPa and the crystal structure of BaCO3 II Physics and Chemistry of Minerals 27 467-473 | 2000 | 2.95 | 293 | ||
0008424 | Witherite | Holl C M, Smyth J R, Laustsen H M S, Jacobsen S D, Downs R T (2000) Compression of witherite to 8 GPa and the crystal structure of BaCO3 II Physics and Chemistry of Minerals 27 467-473 | 2000 | 3.94 | 293 | ||
0008425 | Witherite | Holl C M, Smyth J R, Laustsen H M S, Jacobsen S D, Downs R T (2000) Compression of witherite to 8 GPa and the crystal structure of BaCO3 II Physics and Chemistry of Minerals 27 467-473 | 2000 | 4.56 | 293 | ||
0008426 | Witherite | Holl C M, Smyth J R, Laustsen H M S, Jacobsen S D, Downs R T (2000) Compression of witherite to 8 GPa and the crystal structure of BaCO3 II Physics and Chemistry of Minerals 27 467-473 | 2000 | 5.5 | 293 | ||
0008427 | Witherite | Holl C M, Smyth J R, Laustsen H M S, Jacobsen S D, Downs R T (2000) Compression of witherite to 8 GPa and the crystal structure of BaCO3 II Physics and Chemistry of Minerals 27 467-473 | 2000 | 6.2 | 293 | ||
0008428 | Witherite | Holl C M, Smyth J R, Laustsen H M S, Jacobsen S D, Downs R T (2000) Compression of witherite to 8 GPa and the crystal structure of BaCO3 II Physics and Chemistry of Minerals 27 467-473 | 2000 | 7.05 | 293 | ||
0008429 | Witherite | Holl C M, Smyth J R, Laustsen H M S, Jacobsen S D, Downs R T (2000) Compression of witherite to 8 GPa and the crystal structure of BaCO3 II Physics and Chemistry of Minerals 27 467-473 | 2000 | 7.2 | 293 | ||
0009098 | Witherite | Antao S M, Hassan I (2007) BaCO3: high-temperature crystal structures and the Pmcn --> R3m phase transition at 811 C Physics and Chemistry of Minerals 34 573-580 | 2007 | synthetic | 0 | 293 | |
0009099 | Witherite | Antao S M, Hassan I (2007) BaCO3: high-temperature crystal structures and the Pmcn --> R3m phase transition at 811 C Physics and Chemistry of Minerals 34 573-580 | 2007 | synthetic | 0 | 293 | |
0009100 | Witherite | Antao S M, Hassan I (2007) BaCO3: high-temperature crystal structures and the Pmcn --> R3m phase transition at 811 C Physics and Chemistry of Minerals 34 573-580 | 2007 | synthetic | 0 | 293 | |
0009101 | Witherite | Antao S M, Hassan I (2007) BaCO3: high-temperature crystal structures and the Pmcn --> R3m phase transition at 811 C Physics and Chemistry of Minerals 34 573-580 | 2007 | synthetic | 0 | 293 | |
0009102 | Witherite | Antao S M, Hassan I (2007) BaCO3: high-temperature crystal structures and the Pmcn --> R3m phase transition at 811 C Physics and Chemistry of Minerals 34 573-580 | 2007 | synthetic | 0 | 293 | |
0009103 | Witherite | Antao S M, Hassan I (2007) BaCO3: high-temperature crystal structures and the Pmcn --> R3m phase transition at 811 C Physics and Chemistry of Minerals 34 573-580 | 2007 | synthetic | 0 | 293 | |
0009104 | Witherite | Antao S M, Hassan I (2007) BaCO3: high-temperature crystal structures and the Pmcn --> R3m phase transition at 811 C Physics and Chemistry of Minerals 34 573-580 | 2007 | synthetic | 0 | 293 | |
0009105 | Witherite | Antao S M, Hassan I (2007) BaCO3: high-temperature crystal structures and the Pmcn --> R3m phase transition at 811 C Physics and Chemistry of Minerals 34 573-580 | 2007 | synthetic | 0 | 293 | |
0009106 | Witherite | Antao S M, Hassan I (2007) BaCO3: high-temperature crystal structures and the Pmcn --> R3m phase transition at 811 C Physics and Chemistry of Minerals 34 573-580 | 2007 | synthetic | 0 | 293 | |
0009107 | Witherite | Antao S M, Hassan I (2007) BaCO3: high-temperature crystal structures and the Pmcn --> R3m phase transition at 811 C Physics and Chemistry of Minerals 34 573-580 | 2007 | synthetic | 0 | 293 | |
0009108 | Witherite | Antao S M, Hassan I (2007) BaCO3: high-temperature crystal structures and the Pmcn --> R3m phase transition at 811 C Physics and Chemistry of Minerals 34 573-580 | 2007 | synthetic | 0 | 293 | |
0018034 | Witherite | Colby M, la Coste J (1935) The crystal structure of witherite. _cod_database_code 1011149 Zeitschrift fur Kristallographie 90 1-7 | 1935 | 0 | 293 |
CIF Raw Data - click here to close
Epitaxial Relationships of Witherite
Epitaxial Minerals:
Barytocalcite | BaCa(CO3)2 |
Baryte | BaSO4 |
Epitaxy Comments:
Witherites in parallel growth on Barytocalcite (Blagill). Baryte on witherite, with baryte [010]{102} parallel with witherite [100]{011} and {031}; also otherwise oriented.
X-Ray Powder Diffraction
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Radiation - Copper Kα
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.72 Γ | (100) |
3.68 Γ | (53) |
3.215 Γ | (15) |
2.628 Γ | (24) |
2.590 Γ | (23) |
2.150 Γ | (28) |
2.019 Γ | (21) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-π alteration and/or metamorphism | |
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
Stage 7: Great Oxidation Event | <2.4 |
47c : [Carbonates, phosphates, borates, nitrates] |
Geological Setting:
Low-temperature hydrothermal veins.
Type Occurrence of Witherite
Reference:
Withering, W. (1784) Experiments and observations on the Terra Ponderosa, &c. Philosophical Transactions of the Royal Society: 293-311
Synonyms of Witherite
Other Language Names for Witherite
French:Baryte carbonatΓ©e
Japanese:ζ―ιη³
Latin:Terra ponderosa aerata
Russian:ΠΠΈΡΠ΅ΡΠΈΡ
Simplified Chinese:η’³ι
Έι‘ηΏ
ζ―ιη³
ζ―ιη³
Traditional Chinese:η’³ι
Έι瀦
ζ―ιη³
ζ―ιη³
Relationship of Witherite to other Species
Member of:
Other Members of this group:
Aragonite | CaCO3 | Orth. mmm (2/m 2/m 2/m) |
Cerussite | PbCO3 | Orth. mmm (2/m 2/m 2/m) |
Strontianite | SrCO3 | Orth. mmm (2/m 2/m 2/m) |
Common Associates
Associated Minerals Based on Photo Data:
89 photos of Witherite associated with Calcite | CaCO3 |
76 photos of Witherite associated with Baryte | BaSO4 |
72 photos of Witherite associated with Fluorite | CaF2 |
59 photos of Witherite associated with Alstonite | BaCa(CO3)2 |
21 photos of Witherite associated with Barytocalcite | BaCa(CO3)2 |
15 photos of Witherite associated with Sphalerite | ZnS |
11 photos of Witherite associated with Galena | PbS |
8 photos of Witherite associated with Quartz | SiO2 |
7 photos of Witherite associated with Harmotome | Ba2(Si12Al4)O32 Β· 12H2O |
6 photos of Witherite associated with Gillespite | BaFe2+Si4O10 |
Related Minerals - Strunz-mindat Grouping
5.AB. | Ε kΓ‘chaite | CaCo(CO3)2 |
5.AB.05 | Calcite | CaCO3 |
5.AB.05 | GaspΓ©ite | NiCO3 |
5.AB.05 | Magnesite | MgCO3 |
5.AB.05 | Otavite | CdCO3 |
5.AB.05 | Rhodochrosite | MnCO3 |
5.AB.05 | Siderite | FeCO3 |
5.AB.05 | Smithsonite | ZnCO3 |
5.AB.05 | Spherocobaltite | CoCO3 |
5.AB.05 va | Parakutnohorite | |
5.AB.10 | Ankerite | Ca(Fe2+,Mg)(CO3)2 |
5.AB.10 | Dolomite | CaMg(CO3)2 |
5.AB.10 | Kutnohorite | CaMn2+(CO3)2 |
5.AB.10 | Minrecordite | CaZn(CO3)2 |
5.AB.15 | Aragonite | CaCO3 |
5.AB.15 | Cerussite | PbCO3 |
5.AB.15 | Strontianite | SrCO3 |
5.AB.20 | Vaterite | CaCO3 |
5.AB.25 | Huntite | CaMg3(CO3)4 |
5.AB.30 | Norsethite | BaMg(CO3)2 |
5.AB.35 | Alstonite | BaCa(CO3)2 |
5.AB.40 | Olekminskite | Sr(Sr,Ca,Ba)(CO3)2 |
5.AB.40 | Paralstonite | BaCa(CO3)2 |
5.AB.45 | Barytocalcite | BaCa(CO3)2 |
5.AB.50 | Carbocernaite | (Ca,Na)(Sr,Ce,Ba)(CO3)2 |
5.AB.55 | Benstonite | Ba6Ca6Mg(CO3)13 |
5.AB.60 | Juangodoyite | Na2Cu(CO3)2 |
Other Information
Thermal Behaviour:
Inverts under CO2 pressure to a hexagonal (?), and then an isometric modification upon heating.
Notes:
Soluble in dilute HCl.
Health Risks:
Barium Carbonate is toxic if ingested, and it has been used as a rat poison. Handling of Witherite is not a major cause of concern as long as you avoid breathing in dust (such as may be generated by grinding, sawing or trimming specimens) and you wash your hands after handling.
MSDS Data sheet on Barium Carbonate - NOTE this refers to the powder which is more dangerous to handle than crystalline Witherite.
Oral ld50 between 100 and 300mg/kg.
MSDS Data sheet on Barium Carbonate - NOTE this refers to the powder which is more dangerous to handle than crystalline Witherite.
Oral ld50 between 100 and 300mg/kg.
Internet Links for Witherite
mindat.org URL:
https://www.mindat.org/min-4299.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Witherite
Reference List:
Mallard, Ernest (1895) Sur l'alstonite et la barytocalcite. Bulletin de la Société Française de Minéralogie, 18 (1) 7-12 doi:10.3406/bulmi.1895.2369
Goldschmidt, V. (1923) Atlas der Krystallformen. 9 volumes, atlas, and text. Heidelberg. vol. 9: 80.
de Villiers, Johan P. R. (1971) Crystal structures of aragonite, strontianite, and witherite. American Mineralogist, 56 (5-6) 758-767
Localities for Witherite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
β - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
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| Bea, F., Montero, P., Haissen, F., El Archi, A. (2013) 2.46Ga kalsilite and nepheline syenites from the Awsard pluton, Reguibat Rise of the West African Craton, Morocco. Generation of extremely K-rich magmas at the ArcheanβProterozoic transition. Precambrian Research, 224. 242-254 doi:10.1016/j.precamres.2012.09.024 |
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| Moore, John M., Kuhn, Barbara K., Mark, Darren F., Tsikos, Harilaos (2011) A sugilite-bearing assemblage from the Wolhaarkop breccia, Bruce iron-ore mine, South Africa: Evidence for alkali metasomatism and 40Ar-39Ar dating. European Journal of Mineralogy, 23 (4) 661-673 doi:10.1127/0935-1221/2011/0023-2117 |
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| CΓ‘mara, Fernando, Holtstam, Dan, Jansson, Nils, Jonsson, Erik, Karlsson, Andreas, Langhof, JΓΆrgen, Majka, Jaroslaw, Zetterqvist, Anders (2021) Zinkgruvanite, Ba4Mn2+4Fe3+2(Si2O7)2(SO4)2O2(OH)2, a new ericssonite-group mineral from the Zinkgruvan Zn-Pb-Ag-Cu deposit, Askersund, Γrebro County, Sweden. European Journal of Mineralogy, 33 (6) 659-673 doi:10.5194/ejm-33-659-2021 |
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| Rogers, Austin F. (1932) Sanbornite, a new barium silicate mineral from Mariposa County, California. American Mineralogist, 17 (5) 161-172 |
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Quick NavTopAbout WitheriteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystallographic forms Crystal StructureEpitaxial Relationships X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Alston Moor District, Cumbria, England, UK