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Sodicgedrite (Natriumgedrit)

Additional Functions

Collectors Summary

Color hellbraun
Hardness (Mohs) 5.00 - 6.00
Crystal System orthorhombisch, Pnma

Chemism

Chem­ical formula

Na(Mg,Fe2+)6Al(Si6Al2)O22(OH)2

Chem­ical com­po­si­tion

Aluminium, Eisen, Magnesium, Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 851.5903488 u; Number of atoms in the formula: 42

Info

Empirical formula:

Na(Mg0.75Fe0.25)6Al(Si6Al2)O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.24

2

4.76

1.0079470

2.0158940

Oxygen

O

45.09

24

57.14

15.9994300

383.9863200

Sodium

Na

2.70

1

2.38

22.9897702

22.9897702

Magnesium

Mg

12.84

4.5

10.71

24.3050600

109.3727700

Aluminium

Al

9.51

3

7.14

26.9815382

80.9446146

Silicon

Si

19.79

6

14.29

28.0855300

168.5131800

Iron

Fe

9.84

1.5

3.57

55.8452000

83.7678000

Strunz 9th edi­tion incl. updates

9.DD.05

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
D: Ketten- und Bandsilikate mit 2-periodischen Doppelketten, Si4O11; Amphibol-Familie, Orthoamphibole
05:Amphibole: Ortho

Lapis Clas­sifica­tion

VIII/F.12-115

VIII: SILIKATE
F: Ketten- und Bandsilikate
12: Zweierbänder [Si4O11] 6-; Amphibol-Gruppe; Orthorhombische Amphibole

Clas­sifica­tion by Hölzel

9.DF.240

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
F: Amphiboles; Orthorhombic Amphiboles
2: Gedrite-Group

Dana 8th edi­tion

66.01.02.08

66: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2
01: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2 with P=2 amphibole configuration

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Magnesium-iron-manganese amphiboles  ⇒ Gedrite (Ged) amphiboles

Optical Properties

Color

hellbraun

max. Birefrin­gence

0.018

Birefringence chart\! Sodicgedrite title=Birefringence chart Sodicgedrite

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

1.681

RI value γ / ε

1.695

Ri mean

1.684

2V angle

Biaxial (+) 65°

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pnma

Cell param­e­ters a (Å)

-

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

-

Cell param­e­ters a/b or c/a

-

Cell param­e­ters c/b

-

Cell param­e­ters α

-

Cell param­e­ters β

-

Cell param­e­ters γ

-

Z

4

Volumne (ų)

-

X-Ray Pow­der Diffrac­tion

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5.00 - 6.00

VHN (Hard­ness Vick­ers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Preface

Author (Name, Year)

Leake et al., 1997

References

Canadian Mineralogist 35 (1997), 219

IMA group assignments

Other languages

German

Natriumgedrit

English

Sodicgedrite

French

Sodicgedrite

Spanish

Sodiogedrita

Alternative Name

Na Gedrite

German

Na-Gedrit

Spanish

Sodicgedrita

Sodium Gedrite

English

Sodiumgedrite

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

German pages

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

English pages

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

Mineral Dealer

German pages

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