Ojuelaite Mineral Data (original) (raw)

General Ojuelaite Information

Help on Chemical Formula: Chemical Formula:

ZnFe+++2(AsO4)2(OH)2•4(H2O)

Help on Composition: Composition:

Molecular Weight = 561.00 gm

Zinc 11.66 % Zn 14.51 % ZnO

Iron 19.91 % Fe 28.47 % Fe2O3

Arsenic 26.71 % As 40.97 % As2O5

Hydrogen 1.80 % H 16.06 % H2O

Oxygen 39.93 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

ZnFe3+2(AsO4)2(OH)2•4(H2O)

Help on Environment: Environment:

Oxidation zone mineral.

Help on IMA Status: IMA Status:

Approved IMA 1981

Help on Locality: Locality:

Ojuela mine, Mapimi, Durango, Mexico. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for the locality.

Help on Name Pronunciation: Name Pronunciation:

Ojuelaite + Pronunciation Say OJUELAITE

Help on Synonym: Synonym:

ICSD 76007

PDF 35-516

Ojuelaite Image

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

Ojuelaite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.0602:1:0.5762

Help on Cell Dimensions: Cell Dimensions:

a = 10.247, b = 9.665, c = 5.569, Z = 2; beta = 94.37° V = 549.94 Den(Calc)= 3.39

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): 4.25(1), 2.872(0.9), 7.03(0.82),

Click Here for Large Ojuelaite Structure Window Crystal Structure:

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Help on Above

| | Hughes J M , Bloodaxe E S , Kobel K D , Drexler J W , Mineralogical Magazine , 60 (1996) p.519-521, The atomic arrangement of ojuelaite, ZnFe(3+)2(AsO4)2(OH)2*4H2O, Locality: Ojuela mine, Mapimi, Mexico | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Ojuelaite

Help on Cleavage: Cleavage:

{???} Good

Help on Color: Color:

Greenish yellow.

Help on Density: Density:

3.39

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Hardness: Hardness:

3 - Calcite

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

light yellow

Optical Properties of Ojuelaite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.064 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.064 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2187,KPDmeas= 0.2187,KC= 0.2336
Ncalc = 1.79

Help on Optical Data: Optical Data:

Biaxial (+), a=1.696, b=1.73, g=1.798, bire=0.1020, 2V(Calc)=74, 2V(Meas)=73.

Help on Pleochroism (x): Pleochroism (x):

yellow.

Help on Pleochroism (y): Pleochroism (y):

pale yellow.

Help on Pleochroism (z): Pleochroism (z):

yellow.

Calculated Properties of Ojuelaite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.26 gm/cc
note: Specific Gravity of Ojuelaite =3.39 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0091942018
Boson Index = 0.9908057982

Help on Photoelectric: Photoelectric:

PEOjuelaite = 29.83 barns/electron
U=PEOjuelaite x rElectron Density= 97.34 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ojuelaite is Not Radioactive

Ojuelaite Classification

Help on Dana Class: Dana Class:

42.11.18.03 (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 Ojuelaite Information

Help on References: References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

Help on See Also: See Also:

Links to other databases for Ojuelaite :
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
16 - WWW-MINCRYST

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Ask about Ojuelaite here :
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Print or Cut-and-Paste your Ojuelaite Specimen Label here :

Ojuelaite

ZnFe+++2(AsO4)2(OH)2•4(H2O)
Dana No: 42.11.18.03 Strunz No: 08.DC.15
Locality:

Notes: