Lawsonbauerite Mineral Data

[Mineral Forums] [Minerals for Sale] [About Us] [En Espanol] [Mineral Gallery]
Fabre Minerals - Europe's first Internet mineral dealer, on the web since 1996

General Lawsonbauerite Information

Chemical Formula:

(Mn,Mg)9Zn4(SO4)2(OH)22•8(H2O)

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

Empirical Formula:

Mn²⁺₆Mg₄Zn₄(SO₄)₂(OH)₂₂•8(H₂O)

Environment:

Secondary mineral formed in a metamorphosed stratiform zinc orebody.

IMA Status:

Approved IMA 1979

Locality:

Sterling Hill, Ogdensburg, Sussex Co., New Jersey, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Lawson H. Bauer (1889-1954), American chemist, New Jersey Zinc Company, Franklin, New Jersey, USA.

Name Pronunciation:

Lawsonbauerite + Pronunciation

Synonym:

ICSD 31188

PDF 33-873

Lawsonbauerite Image

Images:

Lawsonbauerite

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

Axial Ratios:

a:b:c =1.0892:1:1.7022

Cell Dimensions:

a = 10.5, b = 9.64, c = 16.41, Z = 2; beta = 95.21° V = 1,654.16 Den(Calc)= 2.81

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 10.457(1), 3.876(0.48), 2.768(0.36),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Treiman A H , Peacor D R , American Mineralogist , 67 (1982) p.1029-1034, The crystal structure of lawsonbauerite, (Mn,Mg)9Zn4(SO4)2(OH)22.8H2O,, and its relation to mooreite

Physical Properties of Lawsonbauerite

Cleavage:

None

Color:

Colorless, White.

Density:

2.87

Diaphaneity:

Transparent to Translucent

Hardness:

4.5 - Between Fluorite and Apatite

Streak:

white

Optical Properties of Lawsonbauerite

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

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

Electron Density:

Bulk Density (Electron Density)=2.78 gm/cc
note: Specific Gravity of Lawsonbauerite =2.81 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Lawsonbauerite}= 15.43 barns/electron
U=PE_{Lawsonbauerite} x rElectron Density= 42.90 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lawsonbauerite is Not Radioactive

Lawsonbauerite Classification

Dana Class:

31.01.04.02 (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

31.01.04.01 Torreyite (Mg,Mn)9Zn4(SO4)2(OH)22•8(H2O) P 2₁/a 2/m

31.01.04.02 Lawsonbauerite (Mn,Mg)9Zn4(SO4)2(OH)22•8(H2O) P 2₁/c 2/m

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

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info

Search for Lawsonbauerite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Lawsonbauerite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Lawsonbauerite Mineral Data :

Ask about Lawsonbauerite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Lawsonbauerite Specimen Label here :

Lawsonbauerite

(Mn,Mg)9Zn4(SO4)2(OH)22•8(H2O)
Dana No: 31.01.04.02 Strunz No: 07.DD.40
Locality:

Notes: