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Neltnerite

Collectors Summary

Color schwarz
Streak color schwarz
Hardness (Mohs) 7
Solubility +++ HCl, Königswasser, - H2O
Crystal System tetragonal, I41/acd

Chemism

Chem­ical formula

CaMn63+SiO12

Chem­ical com­po­si­tion

Calcium, Mangan, Silicium, Sauerstoff

Unit weight: 589.7853894 u; Number of atoms in the formula: 20

Info

Empirical formula:

CaMn6SiO12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

32.55

12

60.00

15.9994300

191.9931600

Silicon

Si

4.76

1

5.00

28.0855300

28.0855300

Calcium

Ca

6.80

1

5.00

40.0784000

40.0784000

Manganese

Mn

55.89

6

30.00

54.9380499

329.6282994

Anal­y­sis wt%

Ø SiO2 : 10.34, CaO : 8.64, Mn2O3 : 80.27, Fe2O3 : 1.07 (Ref: Bulletin de Mineralogie 82)

Strunz 9th edi­tion incl. updates

9.AG.05

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
G: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in meist [6] und > [6] Koordination
05:Braunit-Gruppe

Lapis Clas­sifica­tion

VIII/B.09-007

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen

Clas­sifica­tion by Hölzel

9.AG.220

9: SILICATES
A: Nesosilicates
G: Nesosilicates with Cation: O
2: Braunite-Group

Dana 8th edi­tion

07.05.01.02

07: Multiple Oxides
05: Multiple Oxides where A B X2
01: Humite group (Tetragonal: I41/acd) containing Si

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Braunite group

Optical Properties

Color

schwarz

Streak color

schwarz

Diaphane­ity (Trans­parency)

opak

Crystallography

Crystal Sys­tem

tetragonal

Class (H-M)

4/mmm

Space Group number

142

Space Group

I41/acd

Cell param­e­ters a (Å)

9.464

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

18.854

Cell param­e­ters a/b or c/a

1.992

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

8

Volumne (ų)

1688.702

X-Ray Pow­der Diffrac­tion

2.728(100),
2.364(30),
2.170(30),
1.672(80),
1.427(60),
1.085(50),
1.059(40),
1.056(40)

XRD chart Neltnerite

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)

7

VHN (Hard­ness Vick­ers)

1210 (100g)

Density (g/cm³)

4.63

4.639 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ HCl, Königswasser, - H2O

Preface

Author (Name, Year)

Baudracco-Gritti & Caye & Permingeat & Protas, 1982

References

Bulletin de Minéralogie 105 (1982), 161

IMA group assignments

Other languages

German

Neltnerit

Spanish

Neltnerita

French

Neltnerite

English

Neltnerite

Russian

Нелтнерит

Japanese

ネルトナー鉱

CNMNC (IMA)-Number

IMA 1979-059

CNMNC symbol

Symbol

Nel

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Нелтнерит

Mineral Dealer

German pages

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

Locations with GPS information