'._('einklappen').'
 

Erdite

Pictures (1 Images total)

Erdit
Views (Image: 1165416938): 1344
Erdit

Fundort Mont Saint-Hilaire, Quebéc, Kanada

Copyright: Stephan Wolfsried
Contribution: Hg 2006-12-06
Locality: Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry) / Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec / Kanada

Collectors Summary

Color kupferrot, rot, schwarz
Streak color schwarz
Hardness (Mohs) 2.25
Solubility +++ HCl
Crystal System monoklin, C2/c

Chemism

Chem­ical formula

NaFeS2·2H2O

Chem­ical com­po­si­tion

Eisen, Natrium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 178.9966182 u; Number of atoms in the formula: 10

Info

Empirical formula:

NaFeS2·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.25

4

40.00

1.0079470

4.0317880

Oxygen

O

17.88

2

20.00

15.9994300

31.9988600

Sodium

Na

12.84

1

10.00

22.9897702

22.9897702

Sulfur

S

35.83

2

20.00

32.0655000

64.1310000

Iron

Fe

31.20

1

10.00

55.8452000

55.8452000

Strunz 9th edi­tion incl. updates

2.FD.20

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
F: Sulfide, Arsenide, Alkaide; Sulfide mit Halogeniden, Oxiden, Hydroxiden (H2O)
D: mit O, OH, H2O
20:Erdit-Gruppe

Lapis Clas­sifica­tion

II/F.09-010

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
F: Sulfide mit nichtmetallischem Charakter
9: Alkalisulfide

Clas­sifica­tion by Hölzel

2.KC.300

2: SULFIDES
K: Nonmetallic Sulfides, HalideSulfides, etc.
C: With O,OH,H2O
3: With Water

Dana 8th edi­tion

02.14.05.01

02: Sulfide Minerals
14: Sulfides - Including Selenides and Tellurides (Hydroxyl or Hydrated)

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

kupferrot, rot, schwarz

Streak color

schwarz

Diaphane­ity (Trans­parency)

opak

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell param­e­ters a (Å)

10.693

Cell param­e­ters b (Å)

9.115

Cell param­e­ters c (Å)

5.507

Cell param­e­ters a/b or c/a

1.173

Cell param­e­ters c/b

0.604

Cell param­e­ters α

90°

Cell param­e­ters β

92.17

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

536.364

X-Ray Pow­der Diffrac­tion

6.935(100),
5.342(70),
4.556(40),
3.467(30),
3.317(10),
2.902(10),
2.310(20),
1.748(10)

XRD chart Erdite

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)

2.25

VHN (Hard­ness Vick­ers)

39 (15g)!

Density (g/cm³)

2.3

2.217 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ HCl

Preface

Author (Name, Year)

Czamanske & Leonard & Clark, 1980

References

American Mineralogist 65 (1980), 509

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Erdite

NaFeS2·2H2O

monoklin : 2/m : C2/c

2.FD.20

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Erdite

NaFeS2·2H2O

monoklin : 2/m : C2/c

II/F.09-010

Coyoteite

NaFe3S5·2H2O

triklin : 1, 1 : P1, P1

II/F.09-020

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Erdite

NaFeS2·2H2O

monoklin : 2/m : C2/c

2.KC.300

Coyoteite

NaFe3S5·2H2O

triklin : 1, 1 : P1, P1

2.KC.320

Orickite

CuFeS2·nH2O

2.KC.350

Wilhelmramsayite

Cu3FeS3·2H2O

orthorhombisch : mmm : Pmmm

2.KC.360

Schöllhornite

Na0.3CrS2·H2O

2.KC.390

Cronusite

Ca0.2CrS2·H2O

trigonal : 3m, 32, 3m : R3m, R32, R3m

2.KC.395

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Valleriite

2[(Fe,Cu)S]·1.53[(Mg,Al)(OH)2]

trigonal : 3m : R3m

02.14.01.01

Tochilinite

6(Fe0.9S)·5[(Mg,Fe)(OH)2]

triklin : 1 : C1

02.14.02.01

Haapalaite

2[(Fe,Ni)S]·1.61[(Mg,Fe)(OH)2]

02.14.03.01

Yushkinite

[(Mg0.60Al0.30V0.10)Σ1.0(OH)2][V0.875S2]

trigonal : 3m : P3m1

02.14.03.02

Vyalsovite

FeS·Ca(OH)2·Al(OH)3

02.14.04.01

Erdite

NaFeS2·2H2O

monoklin : 2/m : C2/c

02.14.05.01

Coyoteite

NaFe3S5·2H2O

triklin : 1, 1 : P1, P1

02.14.06.01

Orickite

CuFeS2·nH2O

02.14.07.01

Wilhelmramsayite

Cu3FeS3·2H2O

orthorhombisch : mmm : Pmmm

02.14.08.01

CNMNC (IMA)-Number

IMA 1977-048

CNMNC symbol

Symbol

Erd

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

German pages

DeWikiPedia - search for: Erdit
Google-Bilder-Suche - search for: Erdit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Erdit

English pages

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

Russian pages

Webmineral.ru - search for: Эрдит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Erdit
Crystal-Treasure.com - search for: Erdit
Bosse - search for: Erdit

Locations with GPS information