Earlshannonite Mineral Data (original) (raw)
General Earlshannonite Information
Chemical Formula:
(Mn,Fe++)Fe+++2(PO4)2(OH)2•4(H2O)
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
Empirical Formula:
Mn2+0.5Fe2+0.3Mg0.1Ca0.1Fe3+2(PO4)2(OH)2�4.8(H2O)
Environment:
Very late-stage secondary mineral in a lithium-rich granite pegmatite.
IMA Status:
Approved IMA 1984
Locality:
Foote Quarry, Kings Mountain, Cleveland County, North Carolina, USA. Link to MinDat.org Location Data.
Name Origin:
Named for Earl V. Shannon (1895-1981), American mineralogist and chemist, U. S. National Museum, Washington, D.C., USA.
Name Pronunciation:
Earlshannonite + Pronunciation 
Earlshannonite Image
Images:
Earlshannonite Crystallography
Axial Ratios:
a:b:c =1.0249:1:0.5641
Cell Dimensions:
a = 9.91, b = 9.669, c = 5.455, Z = 2; beta = 93.95° V = 521.46 Den(Calc)= 3.01
Crystal System:
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
X Ray Diffraction:
By Intensity(I/Io): 9.8(1), 6.9(0.8), 2.79(0.7),
Physical Properties of Earlshannonite
Cleavage:
{???} Good, {???} Good
Color:
Yellow, Reddish brown.
Density:
2.9
Diaphaneity:
Transparent to Translucent
Fracture:
Even - Flat surfaces (not cleavage) fractured in an even pattern.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Habit:
Spherical - Spherical, rounded aggregates.
Hardness:
3-4 - Calcite-Fluorite
Luster:
Vitreous (Glassy)
Streak:
light brown
Optical Properties of Earlshannonite
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
Optical Data:
Biaxial (-), a=1.696, b=1.745, g=1.765, bire=0.0690, 2V(Calc)=62, 2V(Meas)=64.
Pleochroism (x):
light yellow.
Pleochroism (y):
light yellow.
Pleochroism (z):
yellow brown.
Calculated Properties of Earlshannonite
Electron Density:
Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Earlshannonite =2.90 gm/cc.
Fermion Index:
Fermion Index = 0.0065293234
Boson Index = 0.9934706766
Photoelectric:
PEEarlshannonite = 10.19 barns/electron
U=PEEarlshannonite x rElectron Density= 29.45 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Earlshannonite is Not Radioactive
Earlshannonite Classification
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
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
References:
NAME( AntBidBlaNic4) PHYS. PROP.(AntBidBlaNic4) OPTIC PROP.(AntBidBlaNic4)
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
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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: