Lawsonbauerite (original) (raw)
A valid IMA mineral species
About LawsonbaueriteHide
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Formula:
(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O
Colour:
colourless to white; grayish tan
Lustre:
Resinous, Greasy, Dull
Crystal System:
Monoclinic
Name:
Named in 1979 by Pete J. Dunn, Donald Ralph Peacor, and Bozidar Darko Sturman in honor of Lawson Henry Bauer [August 18, 1888 Mertztown, Pennsylvania, USA - January 29, 1954 Franklin, New Jersey, USA], former Head Chemist of the New Jersey Zinc Co. laboratory, Franklin, NJ, and specialist in Franklin minerals. He graduated Phi Beta Kappa from Lafayette College and was a Fellow in the Mineralogical Society of America. He served as a member of the Franklin Board of Education and President of the Franklin Board of Health. He co-authored 18 mineralogical papers including the description of 9 new species: cahnite, calcium larsenite (renamed esperite), ferroschallerite (renamed nelenite), larsenite, loseyite, manganpyrosmalite, mcgovernite, mooreite, and yeatmanite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:2352:4
d27fd927-c919-4c5b-b217-c36faa6f8f1d
IMA Classification of LawsonbaueriteHide
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IMA Formula:
Mn2+9Zn4(SO4)2(OH)22 · 8H2O
Type description reference:
Classification of LawsonbaueriteHide
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7.DD.40
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra
31.1.4.2
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq·xH2O, where m:p > 6:1
25.9.12
25 : Sulphates
9 : Sulphates of Mn
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Lwb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of LawsonbaueriteHide
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Transparency:
Transparent, Translucent
Colour:
Colourless to white; grayish tan
Fracture:
Irregular/Uneven
Density:
2.87 g/cm3 (Measured) 2.92 g/cm3 (Calculated)
Optical Data of LawsonbaueriteHide
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RI values:
_n_α = 1.590 _n_β = 1.608 _n_γ = 1.611
2V:
Measured: 42° , Calculated: 44°
δ = 0.021
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Optical Extinction:
Y || b; Z^c = 7°
Pleochroism:
Non-pleochroic
Chemistry of LawsonbaueriteHide
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Mindat Formula:
(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O
Crystallography of LawsonbaueriteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 10.54 Å, b = 9.62 Å, c = 16.46 Å
β = 95.21°
Ratio:
a:b:c = 1.096 : 1 : 1.711
Unit Cell V:
1,662.06 ų (Calculated from Unit Cell)
Morphology:
Bladed to lath-like crystals
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000882 | Lawsonbauerite | Treiman A H, Peacor D R (1982) The crystal structure of lawsonbauerite, (Mn,Mg)9Zn4(SO4)2(OH)22.8H2O, and its relation to mooreite American Mineralogist 67 1029-1034 |  |
1982 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.5 Å | (100) |
| 8.2 Å | (10) |
| 6.24 Å | (30) |
| 5.24 Å | (60) |
| 4.77 Å | (20) |
| 4.61 Å | (20) |
| 4.19 Å | (10) |
| 3.90 Å | (50) |
| 3.77 Å | (20) |
Geological EnvironmentHide
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Type Occurrence of LawsonbaueriteHide
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Associated Minerals at Type Locality:
Reference:
Dunn, P.J., Peacor, D.R., Sturman, B.D. (1979) Lawsonbauerite, a new mineral from the Sterling Hill mine, New Jersey, and new data for torreyite. American Mineralogist: 64: 949-952.
Synonyms of LawsonbaueriteHide
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Other Language Names for LawsonbaueriteHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Fluorescence of LawsonbaueriteHide
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Other InformationHide
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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for LawsonbaueriteHide
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References for LawsonbaueriteHide
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Localities for LawsonbaueriteHide
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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Locality ListHide
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
| USA (TL) | |
|---|---|
| New Jersey Sussex County Ogdensburg Sterling Hill ⓘ Sterling Mine (TL) |
Dunn et al. (1979) +1 other reference |