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Powellite

Pictures (30 Images total)

Powellit mit Celadonit
Views (Image: 1226314314): 4095, Rating: 8.71
Powellit mit Celadonit

Powellit mit eingeschlossenem Celadonit. 5,3x4 cm. Steinbruch Shakur, Nasik, Maharashtra, Indien.

Copyright: Fabre Minerals
Contribution: Collector 2008-11-10
Locality: Shakur / Nashik (Nasik), Distrikt / Maharashtra / Indien
Powellit XX
Views (Image: 1214510904): 2567
Powellit XX

Größe: 1,5 cm; Fundort: Nasik, Maharashtra, Indien

Copyright: Sandro Maggia
Contribution: slugslayer 2008-06-26
Locality: Nashik (Nasik), Distrikt / Maharashtra / Indien
Powellit
Views (Image: 1219954986): 2326
Powellit

Bildbreite: 6 mm; Fundort: Jardinera No. 1 Mine, Inca de Oro, Chañaral-Provinz, Atacama, Chile

Copyright: Leonardus
Contribution: slugslayer 2008-08-28
Locality: Jardinera No. 1 / Inca de Oro / Chañaral, Provinz / Atacama, Region (III. Region) / Chile
Powellit XX
Views (Image: 1207952257): 1868
Powellit XX

Größe: 4.4 x 2.9 x 2.8 cm; Fundort: Jalgaon, Maharashtra, Indien

Copyright: Rob Lavinsky
Contribution: slugslayer 2008-04-12
Locality: Jalgaon, Distrikt / Maharashtra / Indien
Skolezit mit Powellit
Views (Image: 1231286672): 1631
Skolezit mit Powellit

Fundort: Nasik, Maharashtra, Indien; Größe: 12,0 x 8,0 x 4,7 cm

Copyright: Rob Lavinsky
Contribution: slugslayer 2009-01-07
Locality: Nashik (Nasik), Distrikt / Maharashtra / Indien
Cu-Powellit
Views (Image: 1266748253): 675
Cu-Powellit

Kristallgröße: 1 mm; Fundort: Mammoth Mine, Pershing Co., Nevada, USA

Collection: giantcrystal
Copyright: slugslayer
Contribution: slugslayer 2010-02-21
Locality: Mammoth Prospect / Washiki District / Pershing Co. / Nevada / USA

Collectors Summary

Color blau, braun, grün gelb, grünblau, grau
Streak color hellgelb
Lustre Glasglanz, Fettglanz
Hardness (Mohs) 3.5
Solubility +++ HCl, HNO3
Crystal System tetragonal, I41/a

Chemism

Chem­ical formula

CaMoO4

Chem­ical com­po­si­tion

Calcium, Molybdän, Sauerstoff

Unit weight: 200.01812 u; Number of atoms in the formula: 6

Info

Empirical formula:

CaMoO4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

32.00

4

66.67

15.9994300

63.9977200

Calcium

Ca

20.04

1

16.67

40.0784000

40.0784000

Molybdenum

Mo

47.97

1

16.67

95.9420000

95.9420000

Anal­y­sis wt%

CaO : 27.30, MoO3 : 67.84, WO3 : 1.65, Fe2O3 : 0.96, SiO2 : 1.52 (Ref: Dana, 7th ed. 2)

Strunz 9th edi­tion incl. updates

7.GA.05

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
G: Molybdate und Wolframate
A: Ohne zusätzliche [Anionen] oder H2O
05:Scheelit-Gruppe

Lapis Clas­sifica­tion

VI/G.01-010

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
G: Molybdate [MoO4] 2- und Wolframate [WO4] 2-

Clas­sifica­tion by Hölzel

7.GA.100

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
G: Molybdates and Wolframates
A: Molybdates and Wolframates (-Anions -Water)

Dana 8th edi­tion

48.01.02.02

48: Anhydrous Molybdates and Tungstates
01: Anhydrous Molybdates and Tungstates where A XO4
02: Scheelite Series

IMA sta­tus

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

blau, braun, grün gelb, grünblau, grau

Streak color

hellgelb

Diaphane­ity (Trans­parency)

transparent

Lus­tre

Glasglanz, Fettglanz

max. Birefrin­gence

0.011

Birefringence chart\! Powellite title=Birefringence chart Powellite

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

1.967

RI value γ / ε

1.978

Ri mean

1.971

2V angle

Uniaxial (+)

Optical Data Luminescence

Lumi­nes­cence

cremegelb unter LW und KW
Reiner Powellit fluoresziert beim Bestrahlen mit kurzwelligem UV-Licht gelblich-weiß mit einem Emissionsmaximum bei ca. 530 nm. Ersetzt W einen Teil des Mo, dann verschiebt sich dei Emissionsfarbe Richtung blau. Bei reinem Scheelit liegt das Emissionsmaximum bei 430nm.
Vgl. Tyson 1988, s.u.

Color LW-UV (365nm)

 

gelblich weiß

LW-UV Intensity

schwach

LW-UV Obser­va­tion Frequency

sehr selten

Color SW-UV (254nm)

 

gelblich weiß

SW-UV Intensity

sehr stark

SW-UV Obser­va­tion Frequency

intrinsisch

Most Common Acti­vator

MoO42-

After­glow (Per­sistant Lumi­nes­cence)

keine Daten

Image ⇒ Luminescence ⇒ excitation ⇒ UV shortwave ~254nm (1 Images total)

Powellit
Views (Image: 1544828626): 120
Powellit

Powellit unter KW-UV-Licht, im Vordergrund Apophyllit und Stilbit, Shakur (Chakur; Sakhur), Ahmadnagar Distrikt , Maharashtra, Indien, 45 x 35 x 40 mm

Collection: Embarak
Copyright: Embarak
Contribution: Embarak 2018-12-15
Locality: Sakur (Shakur; Chakur; Sakhur) / Ahmadnagar (Ahmednagar), Distrikt / Maharashtra / Indien

Image ⇒ Luminescence ⇒ excitation ⇒ UV longwave ~365nm (1 Images total)

Powellit
Views (Image: 1544828682): 104
Powellit

Powellit unter LW-UV-Licht, im Vordergrund Apophyllit und Stilbit, Shakur (Chakur; Sakhur), Ahmadnagar Distrikt , Maharashtra, Indien, 45 x 35 x 40 mm

Collection: Embarak
Copyright: Embarak
Contribution: Embarak 2018-12-15
Locality: Sakur (Shakur; Chakur; Sakhur) / Ahmadnagar (Ahmednagar), Distrikt / Maharashtra / Indien

Crystallography

Crystal Sys­tem

tetragonal

Class (H-M)

4/m

Space Group number

88

Space Group

I41/a

Cell param­e­ters a (Å)

5.226

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

11.43

Cell param­e­ters a/b or c/a

2.187

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

312.166

X-Ray Pow­der Diffrac­tion

4.76(20),
3.10(100),
2.86(10),
2.61(20),
1.929(30),
1.848(10),
1.694(10),
1.588(20)

XRD chart Powellite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

3.5

VHN (Hard­ness Vick­ers)

160 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.34

4.256 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ HCl, HNO3

Chem­ical Prop­er­ties and Tests

Löslich in Salpeter-Salzsäure

Preface

Author (Name, Year)

Melville, 1891

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 563

Effect of the W:Mo ratio on the shift of excitation and emission spectra in the scheelite-powellites eries - American Mineralogist, Volume 73, pages 1145-1154, 1988 http://www.minsocam.org/ammin/AM73/AM73_1145.pdf

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Stolzite

PbWO4

tetragonal : 4/m : I41/a

7.GA.05

Powellite

CaMoO4

tetragonal : 4/m : I41/a

7.GA.05

Scheelite

CaWO4

tetragonal : 4/m : I41/a

7.GA.05

Wulfenite

PbMoO4

tetragonal : 4/m : I41/a

7.GA.05

'W-bearing Wulfenite'

Pb(Mo,W)O4

tetragonal : 4 : I4

7.GA.05

Formanite-(Y)

YTaO4

monoklin : 2/m : P2/a

7.GA.05

Suseinargiuite

NaBi(MoO4)2

tetragonal : 4/m : I41/a

7.GA.05

Fergusonite-(Y)

YNbO4

tetragonal : 4/m : I41/a

7.GA.05

'Fergusonite-(Ce)'

CeNbO4

tetragonal : 4/m : I41/a

7.GA.05

'Fergusonite-(Nd)'

(Nd,Ce)(Nb,Ti)O4

7.GA.05

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Powellite

CaMoO4

tetragonal : 4/m : I41/a

VI/G.01-010

Scheelite

CaWO4

tetragonal : 4/m : I41/a

VI/G.01-020

Paraniite-(Y)

Ca2Y[AsO4|(WO4)2]

tetragonal : 4/m : I41/a

VI/G.01-025

Wulfenite

PbMoO4

tetragonal : 4/m : I41/a

VI/G.01-030

Suseinargiuite

NaBi(MoO4)2

tetragonal : 4/m : I41/a

VI/G.01-035

Stolzite

PbWO4

tetragonal : 4/m : I41/a

VI/G.01-040

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Powellite

CaMoO4

tetragonal : 4/m : I41/a

7.GA.100

Scheelite

CaWO4

tetragonal : 4/m : I41/a

7.GA.120

Wulfenite

PbMoO4

tetragonal : 4/m : I41/a

7.GA.140

Stolzite

PbWO4

tetragonal : 4/m : I41/a

7.GA.160

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Hübnerite

MnWO4

monoklin : 2/m : P2/c

48.01.01.01

Ferberite

Fe2+WO4

monoklin : 2/m : P2/c

48.01.01.02

Sanmartinite

ZnWO4

monoklin : 2/m : P2/c

48.01.01.03

Scheelite

CaWO4

tetragonal : 4/m : I41/a

48.01.02.01

Powellite

CaMoO4

tetragonal : 4/m : I41/a

48.01.02.02

Wulfenite

PbMoO4

tetragonal : 4/m : I41/a

48.01.03.01

Stolzite

PbWO4

tetragonal : 4/m : I41/a

48.01.03.02

Raspite

PbWO4

monoklin : 2/m : P21/a

48.01.04.01

Other languages

Dutch

Powelliet

German

Powellit

Spanish

Powellita

English

Powellite

French

Powellite

Russian

Повеллит

Simplified Chinese

钼钙矿

Alternative Name

Simplified Chinese

钼酸钙矿

Simplified Chinese

钼钨钙矿

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Powellit
Google-Bilder-Suche - search for: Powellit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Powellit

English pages

Mindat - search for: Powellite
Webmineral - search for:Powellite
Handbook-of-Mineralogy - search for: Powellite
RRUFF - Raman, XRD and other mineral data - search for: Powellite
RRUFF - References and PDF downloads - search for: Powellite
American-Mineralogist-Crystal-Structure-Database - search for: Powellite
Athena - search for: Powellite

Russian pages

Webmineral.ru - search for: Повеллит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Powellit
Crystal-Treasure.com - search for: Powellit
Bosse - search for: Powellit

Locations with GPS information