Mineralogy Database

Earlshannonite Mineral Data

Search Webmineral :
  
Advertisment

General Earlshannonite Information

Help on Chemical  Formula: Chemical Formula: (Mn,Fe++)Fe+++2(PO4)2(OH)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 472.79 gm
   Calcium      0.85 %  Ca    1.19 % CaO
   Magnesium    0.51 %  Mg    0.85 % MgO
   Manganese    5.81 %  Mn    7.50 % MnO
   Iron        27.17 %  Fe    4.56 % FeO / 33.78 % Fe2O3
   Phosphorus  13.10 %  P    30.02 % P2O5
   Hydrogen     2.47 %  H    22.10 % H2O
   Oxygen      50.08 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+0.5Fe2+0.3Mg0.1Ca0.1Fe3+2(PO4)2(OH)2�4.8(H2O)
Help on Environment: Environment: Very late-stage secondary mineral in a lithium-rich granite pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Foote Quarry, Kings Mountain, Cleveland County, North Carolina, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Earl V. Shannon (1895-1981), American mineralogist and chemist, U. S. National Museum, Washington, D.C., USA.
Help on Name Pronunciation: Name Pronunciation: Earlshannonite + Pronunciation Say EARLSHANNONITE
 

Earlshannonite Image

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

  Earlshannonite

Comments: Brownish earlshonnonite aggregate surrounded by white, pegmatitic matrix.
Location: Foote Mine, Kings Mtn, North Carolina, USA. Scale: 2 1/2" x 2".
© Chris Wright / Wrights Rock Shop

Earlshannonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0249:1:0.5641
Help on Cell Dimensions: Cell Dimensions: a = 9.91, b = 9.669, c = 5.455, Z = 2; beta = 93.95° V = 521.46 Den(Calc)= 3.01
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): 9.8(1), 6.9(0.8), 2.79(0.7),
 

Physical Properties of Earlshannonite

Help on Cleavage: Cleavage: {???} Good, {???} Good
Help on Color: Color: Yellow, Reddish brown.
Help on Density: Density: 2.9
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Even - Flat surfaces (not cleavage) fractured in an even pattern.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light brown
 

Optical Properties of Earlshannonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.04 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.075 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2443,KPDmeas= 0.2536,KC= 0.264
Ncalc = 1.77 - 1.79
Help on Optical Data: Optical Data: Biaxial (-), a=1.696, b=1.745, g=1.765, bire=0.0690, 2V(Calc)=62, 2V(Meas)=64.
Help on Pleochroism (x): Pleochroism (x): light yellow.
Help on Pleochroism (y): Pleochroism (y): light yellow.
Help on Pleochroism (z): Pleochroism (z): yellow brown.
 

Calculated Properties of Earlshannonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Earlshannonite =2.90 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0065293234
Boson Index = 0.9934706766
Help on Photoelectric: Photoelectric: PEEarlshannonite = 10.19 barns/electron
U=PEEarlshannonite x rElectron Density= 29.45 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Earlshannonite is Not Radioactive
 

Earlshannonite Classification

Help on  Dana Class: Dana Class: 42.11.18.04 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq � x(H2O)
  (42.11.18)Whitmoreite Group
 
42.11.18.01 Whitmoreite FeFe2(PO4)2(OH)2•4(H2O) P 21/c 2/m
 
42.11.18.02 Arthurite CuFe2(AsO4,PO4,SO4)2(O,OH)2•4(H2O) P 21/c 2/m
 
42.11.18.03 Ojuelaite ZnFe2(AsO4)2(OH)2•4(H2O) P 21/c 2/m
 
42.11.18.04 Earlshannonite (Mn,Fe)Fe2(PO4)2(OH)2•4(H2O) P 21/c 2/m
 
42.11.18.05 Gladiusite! Fe2(Fe,Mg)4(PO4)(OH)13•H2O P 21/n 2/m
 
42.11.18.06 Cobaltarthurite! CoFe2(AsO4)2(OH)2•4(H2O) P 21/c 2/m
 
42.11.18.07 Kunatite CuFe2(PO4)2(OH)2•4H2O P 21/c 2/m
 
42.11.18.08 Bendadaite! FeFe2(AsO4)2(OH)2•4H2O P 21/c 2/m
Help on  Strunz Class: Strunz Class: 08.DC.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
 
08.DC.15 Earlshannonite (Mn,Fe)Fe2(PO4)2(OH)2•4(H2O) P 21/c 2/m
 
08.DC.15 Arthurite CuFe2(AsO4,PO4,SO4)2(O,OH)2•4(H2O) P 21/c 2/m
 
08.DC.15 Ojuelaite ZnFe2(AsO4)2(OH)2•4(H2O) P 21/c 2/m
 
08.DC.15 Whitmoreite FeFe2(PO4)2(OH)2•4(H2O) P 21/c 2/m
 
08.DC.15 Cobaltarthurite! CoFe2(AsO4)2(OH)2•4(H2O) P 21/c 2/m
 
08.DC.15 Kunatite CuFe2(PO4)2(OH)2•4H2O P 21/c 2/m
 
08.DC.15 Bendadaite! FeFe2(AsO4)2(OH)2•4H2O P 21/c 2/m
 

Other Earlshannonite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(AntBidBlaNic4) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Earlshannonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Earlshannonite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Earlshannonite :

Ask about Earlshannonite 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 Espaol

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

Earlshannonite

(Mn,Fe++)Fe+++2(PO4)2(OH)2•4(H2O)
Dana No: 42.11.18.04 Strunz No: 08.DC.15
Locality:

 

Notes:

 

 
   
 


Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.