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Alleghanyite

Pictures (2 Images total)

Alleghanyit
Views (File:
1274551126
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Alleghanyit
Kristallgröße: 2 mm, Fundort: Sterling Mine, Franklin, New Jersey, USA
Copyright: Rob Lavinsky; Contribution: thdun5
Location: USA/New Jersey/Sussex Co./Franklin Mining District/Ogdensburg/Sterling Hill/Sterling Mine
Mineral: Alleghanyite
Image: 1274551126
License: Usage for Mineralienatlas project only
Alleghanyit

Kristallgröße: 2 mm, Fundort: Sterling Mine, Franklin, New Jersey, USA

Copyright: Rob Lavinsky
Contribution: thdun5 2010-05-22
Locality: Sterling Mine / Sterling Hill / Ogdensburg / Franklin Mining District / Sussex Co. / New Jersey / USA
Alleghanyit
Views (File:
1604227665
): 366
Alleghanyit
Alleghanyit; als 2 x 1,5 cm grosse Kleinstufe; Langban,Schweden
Copyright: Rockhounder; Contribution: Rockhounder
Collection: Rockhounder
Location: Schweden/Värmland, Provinz/Filipstad, Gemeinde/Långban, Distrikt
Mineral: Alleghanyite
Image: 1604227665
License: Usage for Mineralienatlas project only
Alleghanyit

Alleghanyit; als 2 x 1,5 cm grosse Kleinstufe; Langban,Schweden

Collection: Rockhounder
Copyright: Rockhounder
Contribution: Rockhounder 2020-11-01
Locality: Långban, Distrikt / Filipstad, Gemeinde / Värmland, Provinz / Schweden

You find additional specimen at the Geolitho Museum

Collectors Summary

Color braun, dunkelrosa
Hardness (Mohs) 5.5
Solubility +++ HCl
Crystal System monoklin, P21/a

Chemism

Chemical formula

Mn5(SiO4)2(OH)2

Chemical composition

Mangan, Silicium, Sauerstoff, Wasserstoff

Unit weight: 492.8715035 u; Number of atoms in the formula: 19

Info

Empirical formula:

Mn5(SiO4)2(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.41

2

10.53

1.0079470

2.0158940

Oxygen

O

32.46

10

52.63

15.9994300

159.9943000

Silicon

Si

11.40

2

10.53

28.0855300

56.1710600

Manganese

Mn

55.73

5

26.32

54.9380499

274.6902495

Analysis wt%

SiO2 : 25.70, MgO : 12.20, ZnO : 3.60, MnO : 53.70, F : 2.30, H2O : 2.80 (Ref: American Mineralogist 85)

Strunz 9th edition incl. updates

9.AF.45

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
F: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in [4], [5] und/oder nur [6] Koordination
45:Chondrodit-Gruppe

Lapis Classification

VIII/B.04-060

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
4: Kationen in tetraedrischer oder oktaedrischer Koordination [4/6]; Humit-Gruppe

Classification by Hölzel

9.AI.320

9: SILICATES
A: Nesosilicates
I: Nesosilicates with OH
3: Chondrodite-Group

Dana 8th edition

52.03.02b.01

52: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
03: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
02b: Humite group (Chondrodite series)

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

braun, dunkelrosa

max. Birefringence

0.036

Birefringence chart\! Alleghanyite title=Birefringence chart Alleghanyite

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

1.756

RI value β

1.780

RI value γ / ε

1.792

Ri mean

1.776

2V angle

Biaxial (-) 72°

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

Alleghanyit
Views (File:
1401186925
): 804
Alleghanyit
Derb, glasige rosa Masse; das UV-Bild (254nm) links, zeigt eine grüne Fluoreszenz = Alleghanyit und rot = Calcit; Stufenbreite = 15 mm. Fundort: Parker Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA.
Copyright: Manfred Früchtl; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A002547, Donator: Klaus Fleck
Location: USA/New Jersey/Sussex Co./Franklin Mining District/Franklin/Franklin Mine/Parker Mine
Mineral: Alleghanyite
Image: 1401186925
License: Usage for Mineralienatlas project only
Alleghanyit (SNr: A002547)

Derb, glasige rosa Masse; das UV-Bild (254nm) links, zeigt eine grüne Fluoreszenz = Alleghanyit und rot = Calcit; Stufenbreite = 15 mm. Fundort: Parker Mine, Franklin, Franklin Mining District, Sus...

Collection: Lithothek der Münchener Micromounter
Copyright: Manfred Früchtl
Contribution: Münchener Micromounter 2014-05-27
Locality: Parker Mine / Franklin Mine / Franklin / Franklin Mining District / Sussex Co. / New Jersey / USA

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell parameters a (Å)

10.467

Cell parameters b (Å)

4.855

Cell parameters c (Å)

8.281

Cell parameters a/b or c/a

2.156

Cell parameters c/b

1.706

Cell parameters α

90°

Cell parameters β

109.18

Cell parameters γ

90°

Z

2

Volume (ų)

397.459

X-Ray Powder Diffraction

3.127(50),
2.860(80),
2.725(50),
2.598(60),
2.425(50),
2.357(50),
2.341(50),
1.799(100)

XRD chart Alleghanyite

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)

5.5

VHN (Hardness Vickers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.02 (gemessen)

4.118 ( ρ calc. Mineralienatlas )

Instability

+++ HCl

(Co-)Type locality

(Co-)Type locality

USA/North Carolina/Alleghany Co./Sparta/Bald Knob

Preface

Author (Name, Year)

Ross & Kerr, 1932

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 16

Other languages

German

Alleghanyit

English

Alleghanyite

French

Alleghanyite

Spanish

Alleghanyíta

Russian

Аллеганит

Simplified Chinese

粒硅锰矿

CNMNC symbol

Symbol

Alh

Locations with GPS information

IDs

GUSID (Global unique identifier short form) z9tPwzRXS0Kt43bj15eauw
GUID (Global unique identifier) C34FDBCF-5734-424B-ADE3-76E3D7979ABB
Database ID 65