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Petedunnite

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Petedunnit
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Petedunnit
Spaltmassen von Petedunnit in Matrix, Franklin Mine, Franklin, New Jersey, USA; BB ~ 6 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: USA/New Jersey/Sussex Co./Franklin Mining District/Franklin/Franklin Mine
Mineral: Petedunnite
Image: 1577791438
License: Usage for Mineralienatlas project only
Petedunnit

Spaltmassen von Petedunnit in Matrix, Franklin Mine, Franklin, New Jersey, USA; BB 6 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2019-12-31
Locality: Franklin Mine / Franklin / Franklin Mining District / Sussex Co. / New Jersey / USA

Collectors Summary

Color dunkelgrün
Streak color grünlichweiß
Hardness (Mohs) 5.5
Crystal System monoklin, C2/c

Chemism

Chemical formula

Ca(Zn,Mn2+,Fe2+,Mg)Si2O6

Chemical composition

Calcium, Eisen, Magnesium, Mangan, Silicium, Zink, Sauerstoff

Unit weight: 251.50239797 u; Number of atoms in the formula: 10

Info

Empirical formula:

Ca(Zn0.55Mn0.3Fe0.1Mg0.05)Si2O6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

38.17

6

60.00

15.9994300

95.9965800
Magnesium

Mg

0.48

0.05

0.50

24.3050600

1.2152530
Silicon

Si

22.33

2

20.00

28.0855300

56.1710600
Calcium

Ca

15.94

1

10.00

40.0784000

40.0784000
Manganese

Mn

6.55

0.3

3.00

54.9380499

16.4814150
Iron

Fe

2.22

0.1

1.00

55.8452000

5.5845200
Zinc

Zn

14.30

0.55

5.50

65.4094000

35.9751700

Analysis wt%

SiO2 : 48.40, Al2O3 : 1.20, Fe2O3 : 3.80, FeO : 5.70, MnO : 5.80, MgO : 2.40, ZnO : 12.60, CaO : 21.30, Na2O : 0.70 (Ref: American Mineralogist 87)

Strunz 9th edition incl. updates

9.DA.15

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
A: Ketten- und Bandsilikate mit 2 periodischen Ketten SiO6; Pyroxen-Familie
15:Ca Klinopyroxene; Diopsid-Gruppe

Lapis Classification

VIII/F.01-080

VIII: SILIKATE
F: Ketten- und Bandsilikate
1: Zweierketten [Si2O6] 4-; Pyroxen-Gruppe; Klinopyroxene

Classification by Hölzel

9.DB.200

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
B: Diopside-Group

Dana 8th edition

65.01.03a.05

65: Inosilicate Minerals
01: Inosilicates Inosilicate Single-Width Unbranched Chains, W=1 with chains P=2
03a: C2/c clinopyroxenes (Ca clinopyroxenes)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Pyroxene group  ⇒ Clinopyroxene group

Optical Properties

Color

dunkelgrün

Streak color

grünlichweiß

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.02
Birefringence chart\! Petedunnite title=Birefringence chart Petedunnite

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

1.68

RI value β

1.69

RI value γ / ε

1.70

Ri mean

1.690

2V angle

Biaxial (-) 80°!

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell parameters a (Å)

9.82

Cell parameters b (Å)

9.00

Cell parameters c (Å)

5.27

Cell parameters a/b or c/a

1.091

Cell parameters c/b

0.586

Cell parameters α

90°

Cell parameters β

105.60

Cell parameters γ

90°

Z

4

Volume (ų)

448.605

X-Ray Powder Diffraction

6.49(10),
3.02(100),
2.96(40),
2.589(30),
2.537(80),
2.227(10),
2.137(10),
2.022(30)
XRD chart Petedunnite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5

VHN (Hardness Vickers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.68

3.724 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

USA/New Jersey/Sussex Co./Franklin Mining District/Franklin/Franklin Mine/Buckwheat Pit (Southwest Opening, Buckwheat Mine)

Preface

Author (Name, Year)

Essene & Peacor, 1987

References

American Mineralogist 72 (1987), 157

Alexandra L. Huber, Soraya Heuss-Aßbichler, Karl Thomas Fehr, Geoffrey D. Bromiley: Petedunnite (CaZnSi2O6): Stability and phase relations in the system CaO-ZnO-SiO2. American Mineralogist 97 (2012) S. 739-749.

IMA group assignments

Other languages

German

Petedunnit

Spanish

Petedunnita

French

Petedunnite

English

Petedunnite

Japanese

ﾋﾟｰﾄﾀﾞﾝ輝石

CNMNC (IMA)-Number

IMA 1983-073

CNMNC symbol

Symbol

Pdu

IDs

GUSID (Global unique identifier short form) SdPXyJCvs0edYUJx4Ay1KA
GUID (Global unique identifier) C8D7D349-AF90-47B3-9D61-4271E00CB528
Database ID 3008