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 % Fe₂O₃

Arsenic 26.46 % As 40.58 % As₂O₅

Hydrogen 1.60 % H 14.31 % H₂O

Oxygen 39.55 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Zn_0.8Mn²⁺_0.2Fe³⁺₄(AsO₄)₄(OH)₆•6(H₂O)

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

Comments: Reddish-brown, massive ogdensburgite.
Location: Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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:

PE_{Ogdensburgite}= 27.16 barns/electron
U=PE_{Ogdensburgite} x rElectron 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:

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