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Lawsonbauerite

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Lawson H. Bauer
Formula:
(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O
System:
Monoclinic
Colour:
colourless to white; ...
Hardness:
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.
Isostructural with:
The manganese analogue of Torreyite.

Classification of Lawsonbauerite

Approved
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
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First Recorded Occurrence of Lawsonbauerite

Year of Discovery:
1979
Associated Minerals at First Recorded Locality:

Physical Properties of Lawsonbauerite

Resinous, Greasy, Dull
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
colourless to white; grayish tan
Streak:
White
Hardness (Mohs):
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.87 g/cm3 (Measured)    2.92 g/cm3 (Calculated)

Crystallography of Lawsonbauerite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Space Group Setting:
P21/c
Cell Parameters:
a = 10.54Å, b = 9.62Å, c = 16.46Å
β = 95.21°
Ratio:
a:b:c = 1.096 : 1 : 1.711
Unit Cell Volume:
V 1,662.06 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Bladed to lath-like crystals
X-Ray Powder Diffraction Data:
d-spacingIntensity
10.5 (100)
8.2 (10)
6.24 (30)
5.24 (60)
4.77 (20)
4.61 (20)
4.19 (10)
3.90 (50)
3.77 (20)
Comments:
ICDD 33-873

Optical Data of Lawsonbauerite

Type:
Biaxial (-)
RI values:
nα = 1.590 nβ = 1.608 nγ = 1.611
2V:
Measured: 42° , Calculated: 44°
Birefringence:
0.021
Max Birefringence:
δ = 0.021
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong
Optical Extinction:
Y || b; Z^c = 7°
Pleochroism:
Non-pleochroic

Chemical Properties of Lawsonbauerite

Formula:
(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O
Essential elements:
All elements listed in formula:

Relationship of Lawsonbauerite to other Species

7.DD.05FelsőbányaiteAl4(SO4)(OH)10 · 4H2O
7.DD.10LangiteCu4(SO4)(OH)6 · 2H2O
7.DD.10PosnjakiteCu4(SO4)(OH)6 · H2O
7.DD.10WroewolfeiteCu4(SO4)(OH)6 · 2H2O
7.DD.15SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
7.DD.20KtenasiteZn(Cu,Zn)4(SO4)2(OH)6 · 6H2O
7.DD.25ChristeliteCu2Zn3(SO4)2(OH)6 · 4H2O
7.DD.30CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2O
7.DD.30DevillineCaCu4(SO4)2(OH)6 · 3H2O
7.DD.30OrthoserpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7.DD.30SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7.DD.30NiedermayriteCdCu4(SO4)2(OH)6 · 4H2O
7.DD.30EdwardsiteCu3Cd2(SO4)2(OH)6·4H2O
7.DD.35Carrboydite[(Ni1-xAlx)(OH)2][SO4]x/2 · nH2O
7.DD.35Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2O
7.DD.35Honessite(Ni1-xFex3+)(OH)2[SO4]x/2 · nH2O
7.DD.35Hydrohonessite(Ni1-xFex3+)(OH)2[SO4]x/2 · nH2O
7.DD.35MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.35Mountkeithite[(Mg1-xFex3+)(OH)2][SO4]x/2 · nH2O
7.DD.35ShigaiteMn6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.35WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2O
7.DD.35WoodwarditeCu1-xAlx(OH)2[SO4]x/2 · nH2O
7.DD.35ZincaluminiteZn6Al6(SO4)2(OH)16 · 5H2O
7.DD.35Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O
7.DD.35ZincowoodwarditeZn1-xAlx(OH)2[SO4]x/2 · nH2O
7.DD.35NatroglaucoceriniteNaxZn8-yAly(SO4)(x+y)/2(OH)16 · 6H2O
7.DD.35NikischeriteFe62+Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.40Torreyite(Mg,Mn2+)72Mn22+Zn4(SO4)2(OH)22 · 8H2O
7.DD.45MooreiteMg92Mn2Zn4(SO4)2(OH)26 · 8H2O
7.DD.50Namuwite(Zn,Cu)4(SO4)(OH)6 · 4H2O
7.DD.55Bechererite(Zn,Cu)6Zn2(SO4,HSiO4)2(OH)12
7.DD.60Ramsbeckite(Cu,Zn)15(SO4)4(OH)22 · 6H2O
7.DD.65VonbezingiteCa6Cu3(SO4)3(OH)12 · 2H2O
7.DD.70RedgilliteCu6(SO4)(OH)10 · H2O
7.DD.75ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
7.DD.75Nickelalumite(Ni,Cu)Al4(SO4,(NO3)2)(OH)12 · 3H2O
7.DD.75KyrgyzstaniteZnAl4(SO4)(OH)12·3H2O
7.DD.80Guarinoite(Zn,Co,Ni)6(SO4)(OH,Cl)10 · 5H2O
7.DD.80Schulenbergite(Cu,Zn)7(SO4,CO3)2(OH)10 · 3H2O
7.DD.80Thérèsemagnanite(Co,Zn,Ni)6(SO4)(OH,Cl)10 · 8H2O
7.DD.80UM1992-30-SO:CCuHZn(Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2O
7.DD.85MontetrisaiteCu6(SO4)(OH)10 · 2H2O
25.9.1SzmikiteMnSO4 · H2O
25.9.2JôkokuiteMnSO4 · 5H2O
25.9.3MallarditeMnSO4 · 7H2O
25.9.4ManganolangbeiniteK2Mn2(SO4)3
25.9.5Chvaleticeite(Mn,Mg)SO4 · 6H2O
25.9.6DespujolsiteCa3Mn4+(SO4)2(OH)6 · 3H2O
25.9.7ApjohniteMn2+Al2(SO4)4 · 22H2O
25.9.8ShigaiteMn6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
25.9.9Ilesite(Mn,Zn,Fe)SO4 · 4H2O
25.9.10MooreiteMg92Mn2Zn4(SO4)2(OH)26 · 8H2O
25.9.11Torreyite(Mg,Mn2+)72Mn22+Zn4(SO4)2(OH)22 · 8H2O
25.9.13Dietrichite(Zn,Fe2+,Mn2+)Al2(SO4)4 · 22H2O

Other Names for Lawsonbauerite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Lawsonbauerite

Reference List:
American Mineralogist (1982): 67: 1029-1034.

Internet Links for Lawsonbauerite

Localities for Lawsonbauerite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
USA
 
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Ogdensburg
          • Sterling Hill
Dunn, P.J., et al: Am.Min.:64:949-952 (1979); Dunn(1995):Pt5:635-636.
Mineral and/or Locality  
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