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Alleghanyite

Pictures (2 Images total)

Alleghanyit
Views (Image: 1274551126): 1989
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 (Image: 1604227665): 302
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

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 (Image: 1401186925): 735
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

Volumne (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

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Аллеганит

Mineral Dealer

German pages

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

Locations with GPS information