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Finnemanite (Finnemanit)

Collectors Summary

Color grauschwarz
Hardness (Mohs) 2.5
Crystal System hexagonal, P63/m

Chemism

Chemical formula

Pb5(As3+O3)3Cl

Chemical composition

Arsen, Blei, Chlor, Sauerstoff

Unit weight: 1440.262876 u; Number of atoms in the formula: 18

Info

Empirical formula:

Pb5(AsO3)3Cl

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

10.00

9

50.00

15.9994300

143.9948700

Chlorine

Cl

2.46

1

5.56

35.4532000

35.4532000

Arsenic

As

15.61

3

16.67

74.9216020

224.7648060

Lead

Pb

71.93

5

27.78

207.2100000

1,036.0500000

Analysis wt%

K2O : 0.44, PbO : 76.83, As2O3 : 20.54, Cl : 2.42 (Ref: Dana, 7th ed. 2)

Strunz 9th edition incl. updates

4.JB.45

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
J: Antimonite, Bismuthite, Sulfite, Selenite, Tellurite
B: [Arsenite], [Antimonite], [Bismuthite]; mit zusätzlichen [Anionen], ohne H20
45:Finnemanit-Gruppe

Lapis Classification

IV/J.03-010

IV: OXIDE
J: Arsenite (mit As3+)
3: Arsenite mit [AsO3] 3--Inseln

Classification by Hölzel

5.JB.300

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
J: Arsenites
B: Arsenites (+Anions -Water)

Dana 8th edition

46.01.01.01

46: Basic or Halogen-Containing Antimonites, Arsenites and Phosphites
01: Basic or Halogen-Containing Antimonites, Arsenites and Phosphites where (A B)m (XO3)p Zq

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

grauschwarz

max. Birefringence

0.010

Birefringence chart\! Finnemanite title=Birefringence chart Finnemanite

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

2.295

RI value γ / ε

2.285

Ri mean

2.292

2V angle

Uniaxial (-)

Crystallography

Crystal System

hexagonal

Class (H-M)

6/m

Space Group number

176

Space Group

P63/m

Cell parameters a (Å)

10.322

Cell parameters b (Å)

-

Cell parameters c (Å)

7.055

Cell parameters a/b or c/a

0.683

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volumne (ų)

650.962

X-Ray Powder Diffraction

5.49(40),
3.35(60),
3.03(100),
2.88(90),
2.07(60),
1.957(50),
1.924(50),
1.352(50)

XRD chart Finnemanite

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)

2.5

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

7.265 (gemessen)

7.347 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Aminoff, 1923

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 202

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

Finnemanite

Pb5(As3+O3)3Cl

hexagonal : 6/m : P63/m

4.JB.45

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

Finnemanite

Pb5(As3+O3)3Cl

hexagonal : 6/m : P63/m

IV/J.03-010

Georgiadesite

Pb4(As3+O3)Cl4(OH)

monoklin : 2/m : P21/c

IV/J.03-015

Freedite

Pb8Cu1+(As3+O3)2O3Cl5

monoklin : 2/m : C2/m

IV/J.03-020

Trigonite

Pb3Mn(As3+O3)2(As3+O2OH)

monoklin : m : Pn

IV/J.03-030

Rouseite

Pb2Mn2+(AsO3)2·2H2O

triklin, triklin : 1, 1 : P1, P1

IV/J.03-040

Nealite

Pb4Fe2+(As5+O3)2Cl4·2H2O

triklin : 1 : P1

IV/J.03-050

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

Finnemanite

Pb5(As3+O3)3Cl

hexagonal : 6/m : P63/m

5.JB.300

Georgiadesite

Pb4(As3+O3)Cl4(OH)

monoklin : 2/m : P21/c

5.JB.310

Gebhardite

Pb8(As23+O5)2OCl6

monoklin : 2/m : P21/c

5.JB.330

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

Finnemanite

Pb5(As3+O3)3Cl

hexagonal : 6/m : P63/m

46.01.01.01

Magnussonite

Mn2+10As3+6O18(OH,Cl)2

kubisch : m3m : Ia3d

46.01.03.01

Stenhuggarite

CaFe3+Sb3+As3+2O7

tetragonal : 4/m : I41/a

46.01.04.01

Freedite

Pb8Cu1+(As3+O3)2O3Cl5

monoklin : 2/m : C2/m

46.01.05.01

Nealite

Pb4Fe2+(As5+O3)2Cl4·2H2O

triklin : 1 : P1

46.01.06.01

Other languages

German

Finnemanit

Spanish

Finnemanita

English

Finnemanite

French

Finnemanite

Russian

Финнеманит

Japanese

フィネマナイト

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

German pages

DeWikiPedia - search for: Finnemanit
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English pages

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American-Mineralogist-Crystal-Structure-Database - search for: Finnemanite
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Russian pages

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German pages

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Locations with GPS information




Notice: "Undefined variable: ub"