Earlshannonite Mineral Data + Say EARLSHANNONITE

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.
 

Earlshannonite Image

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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 - PrismaticH-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 Diaphaniety: Diaphaniety: 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= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2443,KPDmeas= 0.2536,KC= 0.2555
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:

relectron=2.89 gm/cc
note: rEarlshannonite =2.90 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00652
Boson Index = 0.99348
Help on Photoelectric: Photoelectric:

PEEarlshannonite = 10.19 barns/electron
U=PEEarlshannonite x relectron= 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: 42.11.18.4 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq · x(H2O)
  (42.11.18)Dana Group
 
42.11.18.1 Whitmoreite FeFe2(PO4)2(OH)2·4(H2O) P 21/c 2/m
 
42.11.18.2 Arthurite CuFe2(AsO4,PO4,SO4)2(O,OH)2·4(H2O) P 21/c 2/m
 
42.11.18.3 Ojuelaite ZnFe2(AsO4)2(OH)2·4(H2O) P 21/c 2/m
 
42.11.18.4 Earlshannonite (Mn,Fe)Fe2(PO4)2(OH)2·4(H2O) P 21/c 2/m
 
42.11.18.5 Gladiusite! Fe2(Fe,Mg)4(PO4)(OH)13·H2O P 21/n 2/m
 
42.11.18.6 Cobaltarthurite! CoFe2(AsO4)2(OH)2·4(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: VII/D.08-30 VII - Phosphates, Arsenates and Vanadates
  VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe
  VII/D.08 - Arthurite group
 
VII/D.08-10 Kleemanite ZnAl2(PO4)2(OH)2·3(H2O) P 2, P 21, P 2/m or P 21/m Mono
 
VII/D.08-20 Whitmoreite FeFe2(PO4)2(OH)2·4(H2O) P 21/c 2/m
 
VII/D.08-30 Earlshannonite (Mn,Fe)Fe2(PO4)2(OH)2·4(H2O) P 21/c 2/m
 
VII/D.08-40 Arthurite CuFe2(AsO4,PO4,SO4)2(O,OH)2·4(H2O) P 21/c 2/m
 
VII/D.08-45 Cobaltarthurite! CoFe2(AsO4)2(OH)2·4(H2O) P 21/c 2/m
 
VII/D.08-50 Ojuelaite ZnFe2(AsO4)2(OH)2·4(H2O) P 21/c 2/m
 
VII/D.08-60 Mapimite Zn2Fe3(AsO4)3(OH)4·10(H2O) Cm 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Earlshannonite

(Mn,Fe++)Fe+++2(PO4)2(OH)2·4(H2O)
Dana No: 42.11.18.4 Strunz No: VII/D.08-30
Locality:

 

Notes:

 

 
   
 
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