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Coconinoite (Coconinoit)

Pictures (1 Images total)

Coconinoit
Views (File:
1247061443
): 1982
Coconinoit
FO: Jomac Mine, White Canyon, Juan Co., Utah, USA; Bildmitte 5x4 mm
Copyright: Archiv: Berthold Stein (rtbstone); Contribution: rtbstone
Collection: rtbstone
Location: USA/Utah/San Juan Co./White Canyon District/White Canyon/Jomac Mine
Mineral: Coconinoite
Image: 1247061443
Rating: 3 (votes: 2)
License: Usage for Mineralienatlas project only
Coconinoit

FO: Jomac Mine, White Canyon, Juan Co., Utah, USA; Bildmitte 5x4 mm
Collection: rtbstone
Copyright: Archiv: Berthold Stein (rtbstone)
Contribution: rtbstone 2009-07-08
Locality: Jomac Mine / White Canyon / White Canyon District / San Juan Co. / Utah / USA

Collectors Summary

Color cremegelb
Streak color weiß
Hardness (Mohs) 1.00 - 2.00
Solubility +++ Säuren
Crystal System monoklin, C2/c

Chemism

Chemical formula

Fe23+Al2(UO2)2(PO4)4(SO4)(OH)2·20H2O

Chemical composition

Aluminium, Eisen, Phosphor, Sauerstoff, Schwefel, Uran, Wasserstoff

Unit weight: 1575.9794012 u; Number of atoms in the formula: 99

Info

Empirical formula:

Fe2Al2(UO2)2(PO4)4(SO4)(OH)2·20H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.69

42

42.42

1.0079470

42.3337740
Oxygen

O

46.70

46

46.46

15.9994300

735.9737800
Aluminium

Al

3.42

2

2.02

26.9815382

53.9630764
Phosphorus

P

7.86

4

4.04

30.9737612

123.8950448
Sulfur

S

2.03

1

1.01

32.0655000

32.0655000
Iron

Fe

7.09

2

2.02

55.8452000

111.6904000
Uranium

U

30.21

2

2.02

238.0289130

476.0578260

Analysis wt%

Fe2O3 : 9.70, Al2O3 : 6.60, UO3 : 34.90, P2O5 : 18.30, SO3 : 5.40, H2O : 24.00 (Ref: American Mineralogist 66)

Strunz 9th edition incl. updates

8.EB.35

8: Phosphate, Arsenate, Vanadate
E: Uranylphosphate und Arsenate
B: UO2:RO4 = 1:1
35:Coconinoit-Gruppe

Lapis Classification

VII/E.06-020

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
E: Uranyl-Phosphate/Arsenate und Uranyl-Vanadate mit [UO2] 2+- [PO4]/[AsO4] 3- und [UO2] 2+-[V2O8] 6-, sowie isotype Vanadate (Sincosit-Reihe)

Classification by Hölzel

8.EC.190

8: PHOSPHATES ARSENATES VANADATES
E: Uranyl (Phospates-Arsenates-Vanadates)
C: Monoclinic Uranyl (Phosphates-Arsenates)
1: C small-medium Bassetite-Upalite-Group

Dana 8th edition

43.05.05.01

43: Compound Phosphates, etc.
05: Compound Phosphates, etc. (Hydrated Compound Anions With Hydroxyl or Halogen)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

cremegelb

Streak color

weiß

max. Birefringence

0.040
Birefringence chart\! Coconinoite title=Birefringence chart Coconinoite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.550

RI value β

1.588

RI value γ / ε

1.590

Ri mean

1.576

2V angle

Biaxial (-) 40°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell parameters a (Å)

12.50

Cell parameters b (Å)

12.97

Cell parameters c (Å)

23.00

Cell parameters a/b or c/a

0.964

Cell parameters c/b

1.773

Cell parameters α

90°

Cell parameters β

106.60

Cell parameters γ

90°

Z

4

Volumne (ų)

3573.465

X-Ray Powder Diffraction

11.03(100),
5.602(30),
5.521(80),
4.567(30),
3.687(50),
3.286(80),
3.038(50),
3.000(30)
XRD chart Coconinoite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

1.00 - 2.00

VHN (Hardness Vickers)

18 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.70 (gemessen)

2.929 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

USA/Arizona/Coconino Co./Vermillion Cliffs District/Sun Valley Mine

USA/Arizona/Coconino Co./Cameron District/Cameron/Huskon Mines/Huskon No.7 Mine

Preface

Author (Name, Year)

Young & Weeks & Meyrowitz, 1966

References

American Mineralogist 51 (1966), 651

Other languages

German

Coconinoit

English

Coconinoite

French

Coconinoite

Spanish

Coconinoíta

CNMNC (IMA)-Number

IMA 1965-003

CNMNC symbol

Symbol

Coc

Locations with GPS information