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Lawsonbauerite Mineral Data

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General Lawsonbauerite Information

Help on Chemical  Formula: Chemical Formula: (Mn,Mg)9Zn4(SO4)2(OH)22•8(H2O)
Help on Composition: Composition: Molecular Weight = 1,398.82 gm
   Magnesium   6.95 %  Mg   11.53 % MgO
   Manganese  23.56 %  Mn   30.43 % MnO
   Zinc       18.70 %  Zn   23.27 % ZnO
   Hydrogen    2.74 %  H    24.47 % H2O
   Sulfur      4.58 %  S    11.45 % SO3
   Oxygen     43.46 %  O
             ______        ______ 
             100.00 %      101.14 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+6Mg4Zn4(SO4)2(OH)22•8(H2O)
Help on Environment: Environment: Secondary mineral formed in a metamorphosed stratiform zinc orebody.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Sterling Hill, Ogdensburg, Sussex Co., New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Lawson H. Bauer (1889-1954), American chemist, New Jersey Zinc Company, Franklin, New Jersey, USA.
Help on Name Pronunciation: Name Pronunciation: Lawsonbauerite + Pronunciation Say LAWSONBAUERITE
Help on Synonym: Synonym: ICSD 31188
  PDF 33-873

Lawsonbauerite Image

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Comments: Brown, bladed coating of lawsonbauerite crystals on white calcite.
Location: Sterling Hill, Ogdensburg, Sussex Co., New Jersey, USA. Scale: Specimen Size 8 x 7 x 4 cm.
© Rob Lavinsky

Lawsonbauerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0892:1:1.7022
Help on Cell Dimensions: Cell Dimensions: a = 10.5, b = 9.64, c = 16.41, Z = 2; beta = 95.21° V = 1,654.16 Den(Calc)= 2.81
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.457(1), 3.876(0.48), 2.768(0.36),

Physical Properties of Lawsonbauerite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.87
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Streak: Streak: white

Optical Properties of Lawsonbauerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.059 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.039 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2146,KPDmeas= 0.2101,KC= 0.2232
Ncalc = 1.63 - 1.64
Help on Optical Data: Optical Data: Biaxial (-), a=1.59, b=1.608, g=1.611, bire=0.0210, 2V(Calc)=44, 2V(Meas)=42.

Calculated Properties of Lawsonbauerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.78 gm/cc
note: Specific Gravity of Lawsonbauerite =2.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PELawsonbauerite = 15.43 barns/electron
U=PELawsonbauerite x rElectron Density= 42.90 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lawsonbauerite is Not Radioactive

Lawsonbauerite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.01)where (A+ B++)m (XO4)p Zq�x(H2O), where m:p>6:1
  (31.01.04)Dana Group Torreyite (Mg,Mn)9Zn4(SO4)2(OH)22•8(H2O) P 21/a 2/m Lawsonbauerite (Mn,Mg)9Zn4(SO4)2(OH)22•8(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 07.DD.40 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DD -With only medium-sized cations; sheets of edge-sharing octahedra
07.DD.40 Lawsonbauerite (Mn,Mg)9Zn4(SO4)2(OH)22•8(H2O) P 21/c 2/m
07.DD.40 Torreyite (Mg,Mn)9Zn4(SO4)2(OH)22•8(H2O) P 21/a 2/m

Other Lawsonbauerite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Lawsonbauerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 07.DD.40





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