Chapmanite Mineral Data

Chapmanite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About


Dakota Matrix
[Newest Minerals] [Rare Minerals] [Cabinet Specimens] [About Us] [Image Gallery]
Dakota Matrix Minerals
Updated weekly, for the collector, educator, and researcher since 1996
Extensive Inventory of very Rare Minerals. Visa and Mastercard are Welcome


General Chapmanite Information

Help on Chemical Formula: Chemical Formula: Sb+++Fe+++2(SiO4)2(OH)
Help on Composition: Composition: Molecular Weight = 434.62 gm
   Iron      25.70 %  Fe   36.74 % Fe2O3
   Silicon   12.92 %  Si   27.65 % SiO2
   Antimony  28.01 %  Sb   33.54 % Sb2O3
   Hydrogen   0.23 %  H     2.07 % H2O
   Oxygen    33.13 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: SbFe3+2(SiO4)2(OH)
Help on Environment: Environment: Intimately associated with silver ores. Antimomy analog to bismutoferrite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1924
Help on Locality: Locality: Keeley Mine is South Lorrain near Cobalt, Ontaario, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Canadian mineralogist, E. J. Chapman (1821-1904).
Help on Synonym: Synonym: ICSD 87100
  PDF 11-135
 

Chapmanite Image

Click Here for Larger Chapmanite Image in a New Browser Window Images:
Click Here for Larger Chapmanite Image

Chapmanite

Comments: Green, earthy chapmanite on quartz-sulfide matrix.
Location: Neue Hoffnung Gottes Mine, Bräunsdorf, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Chapmanite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5773:1:0.8565
Help on Cell Dimensions: Cell Dimensions: a = 5.19, b = 8.99, c = 7.7, Z = 2; beta = 100.67° V = 353.06 Den(Calc)= 4.09
Help on Crystal System: Crystal System: Monoclinic - DomaticH-M Symbol (m) Space Group: Cm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.58(1), 7.63(0.9), 3.19(0.9),3.88(0.8), 2.59(0.7), 2.9(0.7), 2.54(0.3), 4.17(0.3),
Click Here for Large Chapmanite Structure Window 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


Ballirano P , Maras A , Marchetti F , Merlino S , Perchiazzi N , Powder Diffraction , 13 (1998) p.44-49, Rietveld refinement of chapmanite SbFe2Si2O8OH,, a TO dioctahderal kaolinite-like mineral, Locality: Tafone mine, Tucsany, Italy

 

Physical Properties of Chapmanite

Help on Color: Color: Yellowish green, Yellow, Olive green.
Help on Density: Density: 3.58 - 3.7, Average = 3.64
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: yellowish green
 

Optical Properties of Chapmanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.094 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2249,KPDmeas= 0.2527,KC= 0.2484
Ncalc = 1.89 - 2.02
Help on Optical Data: Optical Data: Biaxial (-), a=1.85, b=1.95, g=1.96, bire=0.1100, 2V(Calc)=32, 2V(Meas)=small. Dispersion none.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.
 

Calculated Properties of Chapmanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.42 gm/cc
note: Specific Gravity of Chapmanite =3.64 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEChapmanite = 96.25 barns/electron
U=PEChapmanite x rElectron Density= 328.91 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chapmanite is Not Radioactive
 

Chapmanite Classification
Help on Dana Class: Dana Class: 71.01.03.02 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.01)with 1:1 layers
  (71.01.03)Bismutoferrite group
 
71.01.03.01 Bismutoferrite BiFe2(SiO4)2(OH) Cm m
 
71.01.03.02 Chapmanite SbFe2(SiO4)2(OH) Cm m
Help on Strunz Class: Strunz Class: 09.ED.25 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.ED -Phyllosilicates with kaolinite layers
 
09.ED.25 Bismutoferrite BiFe2(SiO4)2(OH) Cm m
 
09.ED.25 Chapmanite SbFe2(SiO4)2(OH) Cm m
 

Other Chapmanite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Chapmanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Chapmanite using:

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

Visit our Advertisers for Chapmanite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Chapmanite Mineral Data :

Ask about Chapmanite 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 Chapmanite Specimen Label here :

Chapmanite

Sb+++Fe+++2(SiO4)2(OH)
Dana No: 71.01.03.02 Strunz No: 09.ED.25
Locality:

 

Notes: