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Donpeacorite

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Donpeacorit
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Donpeacorit  E
Analysed with energy dispersive X-ray spectroscopy EDX

oranges Kristallaggregat von Donpeacorit, Balmat, St Lawrence County, New York, USA; BB 3 mm, analysiert mittels REM-EDX

Copyright: Joy Desor
Contribution: openpit 2020-06-20
Locality: Balmat / Balmat-Edwards Zinc District / St. Lawrence Co. / New York / USA

Collectors Summary

Color gelborange
Hardness (Mohs) 5.5
Crystal System orthorhombisch, Pbca

Chemism

Chem­ical formula

(Mn,Mg)MgSi2O6

Chem­ical com­po­si­tion

Magnesium, Mangan, Silicium, Sauerstoff

Unit weight: 223.752502425 u; Number of atoms in the formula: 10

Info

Empirical formula:

(Mn0.75Mg0.25)MgSi2O6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

42.90

6

60.00

15.9994300

95.9965800

Magnesium

Mg

13.58

1.25

12.50

24.3050600

30.3813250

Silicon

Si

25.10

2

20.00

28.0855300

56.1710600

Manganese

Mn

18.41

0.75

7.50

54.9380499

41.2035374

Anal­y­sis wt%

SiO2 : 55.12, MnO : 18.48, MgO : 26.31, CaO : 0.69 (Ref: American Mineralogist 1984)

Strunz 9th edi­tion incl. updates

9.DA.05

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
A: Ketten- und Bandsilikate mit 2 periodischen Ketten SiO6; Pyroxen-Familie
05:Orthopyroxene

Lapis Clas­sifica­tion

VIII/F.02-030

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

Clas­sifica­tion by Hölzel

9.DE.110

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
E: Orthorhombic Pyroxenes and Pyroxenoides
1: Enstatite-Group

Dana 8th edi­tion

65.01.02.03

65: Inosilicate Minerals
01: Inosilicates Inosilicate Single-Width Unbranched Chains, W=1 with chains P=2
02: Orthopyroxenes

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Pyroxene group  ⇒ Orthopyroxene group

Optical Properties

Color

gelborange

Diaphane­ity (Trans­parency)

transparent bis durchscheinend

max. Birefrin­gence

0.015

Birefringence chart\! Donpeacorite title=Birefringence chart Donpeacorite

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

1.677

RI value β

1.684

RI value γ / ε

1.692

Ri mean

1.684

2V angle

Biaxial (-) 88°

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

61

Space Group

Pbca

Cell param­e­ters a (Å)

18.384

Cell param­e­ters b (Å)

8.878

Cell param­e­ters c (Å)

5.226

Cell param­e­ters a/b or c/a

2.071

Cell param­e­ters c/b

0.589

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

8

Volumne (ų)

852.952

X-Ray Pow­der Diffrac­tion

4.03(10),
3.18(100),
3.09(10),
2.961(10),
2.896(60),
2.510(10),
1.495(10),
1.479(10)

XRD chart Donpeacorite

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)

3.36

3.485 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Petersen & Anovitz & Essene, 1984

References

American Mineralogist 69 (1984), 472

IMA group assignments

Other languages

German

Donpeacorit

Spanish

Donpeacorita

French

Donpeacorite

English

Donpeacorite

Russian

Донпикорит

CNMNC symbol

Symbol

Don

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

German pages

DeWikiPedia - search for: Donpeacorit
Google-Bilder-Suche - search for: Donpeacorit
Mineralienatlas.de (Forum) - search for: Donpeacorit

English pages

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

Russian pages

Webmineral.ru - search for: Донпикорит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Donpeacorit
Crystal-Treasure.com - search for: Donpeacorit
Bosse - search for: Donpeacorit
Edelsteine Neuburg - Gundolf Fischer - search for: Donpeacorit