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Packratite (Packratit)

Collectors Summary

Color sehr dunkelblau, grünlichblau
Crystal System triklin, P1

Chemism

Chemical formula

Ca11(As3+V5+10V4+2As5+6O51)2·83H2O

Chemical composition

Arsen, Calcium, Sauerstoff, Vanadium, Wasserstoff

Unit weight: 5839.57482 u; Number of atoms in the formula: 400

Info

Empirical formula:

Ca11(AsV10V2As6O51)2·83H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.87

166

41.50

1.0079470

167.3192020

Oxygen

O

50.69

185

46.25

15.9994300

2,959.8945500

Calcium

Ca

7.55

11

2.75

40.0784000

440.8624000

Vanadium

V

20.94

24

6.00

50.9415100

1,222.5962400

Arsenic

As

17.96

14

3.50

74.9216020

1,048.9024280

Strunz 9th edition incl. updates

8

8: Phosphate, Arsenate, Vanadate
8:
8:

Lapis Classification

IV/G.15-030

IV: OXIDE
G: Vanadiumoxide (Polyvanadate mit V4+/5+)

IMA status

anerkannt - (CNMNC) Newsletter 22 - Mineralogical Magazine, 2014, Vol. 78(5), pp. 1241-1248

Mineral status

anerkanntes Mineral

Optical Properties

Color

sehr dunkelblau, grünlichblau

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

18.0572(4)

Cell parameters b (Å)

19.4126(4)

Cell parameters c (Å)

24.0586(17)

Cell parameters a/b or c/a

0.93

Cell parameters c/b

1.239

Cell parameters α

87.364(6)°

Cell parameters β

86.266(6)°

Cell parameters γ

79.267(6)º

Z

2

Volume (ų)

8263.374

Crystal structure

Neuer Strukturtyp; Struktur bestimmt

X-Ray Powder Diffraction

14.50(49), 12.13(49), 10.53(100), 7.45(20), 6.61(16), 2.939(22), 2.846(19), 2.732(22)

XRD chart Packratite

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

Crystals 3D

Open larger view

Physical Properties

Density (g/cm³)

2.347 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

USA/Colorado/Mesa Co./Gateway Mining District/Packrat Mine

Type material

Natural History Museum of Los Angeles County, Los Angeles, California, USA

Collection number of type material

64513 und 64514

Paragenesis of type material

Auf Montroseit- und Corvusit-haltigem Sandstein mit Pharmakolith, Gatewayit, Vanarsit, Morrisonit, Packratit

Preface

Author (Name, Year)

Kampf, A. R., Hughes, J. M., Marty, J., and Nash, B. P. (2014)

References

Kampf, A.R., Hughes, J.M., Marty, J. and Nash, B.P. (2014) Packratite, IMA 2014- 059. CNMNC Newsletter No. 22, October 2014, page 1247; Mineralogical Magazine, 78, 1241-1248.

Kampf, A. R., Hughes, J. M., Nash, Barbara P., and Marty, J. Vanarsite, packratite, morrisonite, and gatewayite: four new minerals containing the [As3+V4+,5+12As5+6O51] heteropolyanion, a novel polyoxometalate cluster. Canadian Mineralogist, 54, 145-162.

Other languages

German

Packratit

English

Packratite

CNMNC (IMA)-Number

IMA 2014-059

CNMNC symbol

Symbol

Pkt

Locations with GPS information

IDs

GUSID (Global unique identifier short form) F0IeY5r0LkO7GtxyxRGGEA
GUID (Global unique identifier) 631E4217-F49A-432E-BB1A-DC72C5118610
Database ID 7813