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Almarudite

Pictures (6 Images total)

Almarudit
Views (File:
1446068523
): 1367
Almarudit
Bellerberg, Eifel. BB 1,0mm. Vom Typmaterial das von Alice und Eugen Rondorf gefunden wurde.
Copyright: Mabu; Contribution: Mabu
Collection: Mabu
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Vordereifel, Verbandsgemeinde/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Almarudite
Image: 1446068523
Rating: 10 (votes: 1)
License: Usage for Mineralienatlas project only
Almarudit

Bellerberg, Eifel. BB 1,0mm. Vom Typmaterial das von Alice und Eugen Rondorf gefunden wurde.
Collection: Mabu
Copyright: Mabu
Contribution: Mabu 2015-10-28
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Vordereifel, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Almarudit
Views (File:
1249785738
): 2640
Almarudit
Bildbreite: 2 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland
Copyright: Stephan Wolfsried; Contribution: Philip Blümner
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Vordereifel, Verbandsgemeinde/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Almarudite
Image: 1249785738
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Almarudit

Bildbreite: 2 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland
Copyright: Stephan Wolfsried
Contribution: Philip Blümner 2009-08-09
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Vordereifel, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Almarudit
Views (File:
1174918499
): 6206
Almarudit
Bildbreite: 2 mm; Fundort Stbr. Caspar, Ettringer Bellerberg, Ettringen, Mayen, Eifel
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Vordereifel, Verbandsgemeinde/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Almarudite
Image: 1174918499
Rating: 7.5 (votes: 2)
License: Usage for Mineralienatlas project only
Almarudit

Bildbreite: 2 mm; Fundort Stbr. Caspar, Ettringer Bellerberg, Ettringen, Mayen, Eifel
Copyright: Stephan Wolfsried
Contribution: Hg 2007-03-26
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Vordereifel, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Almarudit
Views (File:
1232237222
): 2095
Almarudit
Bildbreite: 1 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Vordereifel, Verbandsgemeinde/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Almarudite
Image: 1232237222
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Almarudit

Bildbreite: 1 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland
Copyright: Stephan Wolfsried
Contribution: Hg 2009-01-18
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Vordereifel, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Almarudit
Views (File:
1400055921
): 1334
Almarudit
Bildbreite: 0,9 mm, Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Vordereifel, Verbandsgemeinde/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Almarudite
Image: 1400055921
License: Usage for Mineralienatlas project only
Almarudit

Bildbreite: 0,9 mm, Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland
Copyright: Stephan Wolfsried
Contribution: Hg 2014-05-14
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Vordereifel, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland

You find additional specimen at the Geolitho Museum

Collectors Summary

Color gelb, orange
Streak color blassorange
Hardness (Mohs) 6
Cleavages keine
Fracture unregelmäßig
Crystal System hexagonal, P6/mcc

Chemism

Chemical formula

(K,Na)(Mn2+,Fe2+,Mg)2(Be,Al)3[Si12O30]

Chemical composition

Aluminium, Beryllium, Eisen, Magnesium, Mangan, Natrium, Silicium, Kalium, Sauerstoff

Unit weight: 996.887790755 u; Number of atoms in the formula: 48

Info

Empirical formula:

(K0.75Na0.25)(Mn0.6Fe0.3Mg0.1)2(Be0.75Al0.25)3[Si12O30]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Beryllium

Be

2.03

2.25

4.69

9.0121823

20.2774102
Oxygen

O

48.15

30

62.50

15.9994300

479.9829000
Sodium

Na

0.58

0.25

0.52

22.9897702

5.7474426
Magnesium

Mg

0.49

0.2

0.42

24.3050600

4.8610120
Aluminium

Al

2.03

0.75

1.56

26.9815382

20.2361537
Silicon

Si

33.81

12

25.00

28.0855300

337.0263600
Potassium

K

2.94

0.75

1.56

39.0983100

29.3237325
Manganese

Mn

6.61

1.2

2.50

54.9380499

65.9256599
Iron

Fe

3.36

0.6

1.25

55.8452000

33.5071200

Analysis wt%

SiO2 : 72.31, Al2O3 : 4.09, BeO : 5.18, FeO : 4.48, MgO : 1.51, MnO : 7.31, Na2O : 0.66, K2O : 4.05 (Ref: Neues Jahrbuch für Mineralogie, (Monatshefte) A2004)

Strunz 9th edition incl. updates

9.CM.05

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
M: ~[Si6O18]12- sechser-Doppelringe
05:Milarit-Gruppe

Lapis Classification

VIII/E.22-022

VIII: SILIKATE
E: Ringsilikate
22: Doppelte Sechserringe [Si12O30] 12-; Milarit/Osumilith-Gruppe

Classification by Hölzel

9.CF.105

9: SILICATES
C: Cyclosilicates
F: ~[Si12O30]12--Rings Milarite-Group

Dana 8th edition

63.02.01a.18

63: Cyclosilicates Cyclosilicate Condensed Rings
02: Cyclosilicates Cyclosilicate Condensed Rings 6-membered rings
01a: Milarite - Osumilite group (Milarite - Osumilite subgroup)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Osumilite Group

Optical Properties

Color

gelb, orange

Streak color

blassorange

max. Birefringence

0.001
Birefringence chart\! Almarudite title=Birefringence chart Almarudite

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

1.560

RI value γ / ε

1.559

Ri mean

1.560

2V angle

Uniaxial (-)

Crystallography

Crystal System

hexagonal

Class (H-M)

6/mmm

Space Group number

192

Space Group

P6/mcc

Cell parameters a (Å)

9.997

Cell parameters b (Å)

-

Cell parameters c (Å)

14.090

Cell parameters a/b or c/a

1.409

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volume (ų)

1219.498

X-Ray Powder Diffraction

7.05(40),
5.000(40),
4.076(80),
3.522(40),
3.187(90),
2.882(100),
2.732(50),
1.826(40)
XRD chart Almarudite

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)

6

Density (g/cm³)

2.72 (berechnet)

2.715 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

unregelmäßig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Vordereifel, Verbandsgemeinde/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)

Preface

Author (Name, Year)

Mihajlovic & Lengauer & Ntaflos & Kolitsch & Tillmanns, 2004

References

Neues Jahrbuch für Mineralogie, Abhandlungen 179 (2004), 265

IMA group assignments

Other languages

German

Almarudit

Spanish

Almarudita

English

Almarudite

French

Almarudite

Russian

Альмарудит

Simplified Chinese

阿尔玛鲁道夫石

Traditional Chinese

阿爾瑪魯道夫石

CNMNC (IMA)-Number

IMA 2002-048

CNMNC symbol

Symbol

Alr

Locations with GPS information

IDs

GUSID (Global unique identifier short form) W9YISlrtx0GuZXbLEsLg1Q
GUID (Global unique identifier) 4A08D65B-ED5A-41C7-AE65-76CB12C2E0D5
Database ID 72