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Glaucochroite (Glaucochroit)

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Glaukochroit
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Glaukochroit
Glaukochroit (rosafarben), Willemit (grünlich) und Franklinit (schwarz). Franklin Mining District, Sussex County, New Jersey, USA.
Copyright: Public Domain; Contribution: Collector
Location: USA/New Jersey/Sussex Co./Franklin Mining District
Mineral: Glaucochroite
Image: 1298244996
License: Usage for Mineralienatlas project only
Glaukochroit

Glaukochroit (rosafarben), Willemit (grünlich) und Franklinit (schwarz). Franklin Mining District, Sussex County, New Jersey, USA.
Copyright: Public Domain
Contribution: Collector 2011-02-21
Locality: Franklin Mining District / Sussex Co. / New Jersey / USA

You find additional Glaucochroit specimen at the Geolitho Museum

Collectors Summary

Color bläulichgrün
Streak color weiß
Hardness (Mohs) 6
Solubility +++ HCl
Crystal System orthorhombisch, Pbnm

Chemism

Chemical formula

CaMnSiO4

Chemical composition

Calcium, Mangan, Silicium, Sauerstoff

Unit weight: 187.0996999 u; Number of atoms in the formula: 7

Info

Empirical formula:

CaMnSiO4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

34.21

4

57.14

15.9994300

63.9977200
Silicon

Si

15.01

1

14.29

28.0855300

28.0855300
Calcium

Ca

21.42

1

14.29

40.0784000

40.0784000
Manganese

Mn

29.36

1

14.29

54.9380499

54.9380499

Analysis wt%

SiO2 : 32.30, MgO : 0.40, CaO : 28.50, ZnO : 1.90, MnO : 37.00 (Ref: American Mineralogist 87)

Strunz 9th edition incl. updates

9.AC.05

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
C: Insel(Neso)silikate ohne weitere Anionen; Kationen in oktahedraler [6] Koordination
05:Olivin-Gruppe

Lapis Classification

VIII/A.05-030

VIII: SILIKATE
A: Inselsilikate mit [SiO4] 4--Baugruppen
5: Kationen in oktaedrischer Koordination [6]

Classification by Hölzel

9.AB.180

9: SILICATES
A: Nesosilicates
B: Olivine-Group

Dana 8th edition

51.03.02.03

51: Nesosilicate Minerals
03: Nesosilicates Nesosilicate Insular SiO4 Groups Only with all cations in octahedral [6] coordination
02: Monticellite - Kirschsteinite series

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

bläulichgrün

Streak color

weiß

max. Birefringence

0.051
Birefringence chart\! Glaucochroite title=Birefringence chart Glaucochroite

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

1.685

RI value β

1.723

RI value γ / ε

1.736

Ri mean

1.715

2V angle

Biaxial (-) 61°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pbnm

Cell parameters a (Å)

4.92

Cell parameters b (Å)

11.14

Cell parameters c (Å)

6.50

Cell parameters a/b or c/a

0.442

Cell parameters c/b

0.583

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

356.257

X-Ray Powder Diffraction

4.23(40),
3.69(60),
2.96(60),
2.69(80),
2.63(80),
1.85(100),
1.13(50),
1.11(50)
XRD chart Glaucochroite

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)

6

VHN (Hardness Vickers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.48 (gemessen)

3.488 ( ρ calc. Mineralienatlas )

Instability

+++ HCl

(Co-)Type locality

(Co-)Type locality

USA/New Jersey/Sussex Co./Franklin Mining District/Franklin/Franklin Marble/Furnace Quarry

Preface

Author (Name, Year)

Penfield & Warren, 1899

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 291

Other languages

English

Glaucochroite

French

Glaucochroite

Spanish

Glaucocroíta

German

Glaukochroit

Russian

Глаукохроит

Alternative Name

German

Calcotephroit

Spanish

Calcotephroita

Calcotephroite

Glauchchroite

German

Glaucochroit

Spanish

Glaucochroita

CNMNC symbol

Symbol

Glc

Locations with GPS information