Ogdensburgite Mineral Data
General Ogdensburgite Information
Chemical Formula:
Ca2(Zn,Mn)Fe+++4(AsO4)4(OH)6•6(H2O)
Composition:
Molecular Weight = 1,132.66 gm
Calcium 7.08 % Ca 9.90 % CaO
Manganese 0.97 % Mn 1.25 % MnO
Zinc 4.62 % Zn 5.75 % ZnO
Iron 19.72 % Fe 28.20 % Fe2 O3
Arsenic 26.46 % As 40.58 % As2 O5
Hydrogen 1.60 % H 14.31 % H2 O
Oxygen 39.55 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Ca2 Zn0.8 Mn2+ 0.2 Fe3+ 4 (AsO4 )4 (OH)6 •6(H2 O)
Environment:
Secondary Fe arsenate.
IMA Status:
Approved IMA 1981
Locality:
Sterling Hill mine, Ogdensburg, New Jersy, USA. Link to MinDat.org Location Data.
Name Origin:
Named for the locality.
Name Pronunciation:
Ogdensburgite + Pronunciation
Ogdensburgite Image
Images:
Ogdensburgite Crystallography
Axial Ratios:
a:b:c =0.765:1:0.4418
Cell Dimensions:
a = 11.351, b = 14.837, c = 6.555, Z = 2; V = 1,103.96 Den(Calc)= 3.41
Crystal System:
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Bmmm
X Ray Diffraction:
By Intensity(I/Io ): 14.8(1), 2.656(0.3), 4.52(0.3),
Physical Properties of Ogdensburgite
Cleavage:
{001} Perfect, {010} Fair, {100} Poor
Color:
Brownish red, Dark brown, Reddish orange.
Density:
2.92 - 3.11, Average = 3.01
Diaphaneity:
Translucent
Habit:
Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Habit:
Micaceous - Platy texture with "flexible" plates.
Hardness:
2 - Gypsum
Luminescence:
Non-fluorescent.
Luster:
Resinous
Streak:
brown yellow
Optical Properties of Ogdensburgite
Gladstone-Dale:
CI meas = -0.071 (Fair) - where the CI = (1-KPDmeas /KC ) CI calc = 0.053 (Good) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2232,KPDmeas = 0.2524,KC = 0.2356 Ncalc = 1.69 - 1.8
Optical Data:
Biaxial (-), a=1.715, b=1.783, g=1.785, bire=0.0700, 2V(Calc)=18, 2V(Meas)=5-10.
Pleochroism (x):
yellow.
Pleochroism (y):
reddish brown.
Pleochroism (z):
reddish brown.
Calculated Properties of Ogdensburgite
Electron Density:
Bulk Density (Electron Density)=3.29 gm/cc note: Specific Gravity of Ogdensburgite =3.41 gm/cc.
Fermion Index:
Fermion Index = 0.0063625503 Boson Index = 0.9936374497
Photoelectric:
PEOgdensburgite = 27.16 barns/electronU=PEOgdensburgite x r Electron Density= 89.45 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ogdensburgite is Not Radioactive
Ogdensburgite Classification
Dana Class:
42.09.07.01 (42) Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
(42.09) where (A)3 (XO4)2 Zq � x(H2O)
(42.09.07) Dana Group
42.09.07.01 Ogdensburgite Ca2(Zn,Mn)Fe4(AsO4)4(OH)6•6(H2O) Bmmm 2/m 2/m 2/m
Strunz Class:
08.DC.57 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.57 Ogdensburgite Ca2(Zn,Mn)Fe4(AsO4)4(OH)6•6(H2O) Bmmm 2/m 2/m 2/m
Other Ogdensburgite Information
References:
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
See Also:
Links to other databases for Ogdensburgite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
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Ogdensburgite
Ca2(Zn,Mn)Fe+++4(AsO4)4(OH)6•6(H2O)
Dana No: 42.09.07.01 Strunz No: 08.DC.57
Locality:
Notes:
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