http://www.spessartit.de/walldorf.html
https://www.edelsteine-neuburg.de
https://www.mineraliengrosshandel.com
https://www.mineral-bosse.de
https://www.mineralbox.biz
'._('einklappen').'
 

Wallkilldellite

Collectors Summary

Color dunkelrot
Streak color hellorange
Hardness (Mohs) 3
Crystal System hexagonal, P63/mmc, P63mc, P62c

Chemism

Chemical formula

Ca4Mn62+As45+O16(OH)8·18H2O

Chemical composition

Arsen, Calcium, Mangan, Sauerstoff, Wasserstoff

Unit weight: 1505.9540354 u; Number of atoms in the formula: 100

Info

Empirical formula:

Ca4Mn6As4O16(OH)8·18H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.94

44

44.00

1.0079470

44.3496680
Oxygen

O

44.62

42

42.00

15.9994300

671.9760600
Calcium

Ca

10.65

4

4.00

40.0784000

160.3136000
Manganese

Mn

21.89

6

6.00

54.9380499

329.6282994
Arsenic

As

19.90

4

4.00

74.9216020

299.6864080

Strunz 9th edition incl. updates

8.DL.20

8: Phosphate, Arsenate, Vanadate
D: Phosphate, mit weiteren Anionen, mit H2O
L: Mit großen und mittelgroßen [Kationen], (OH, etc.):RO4 = 2:1
20:Wallkilldellit-Gruppe

Lapis Classification

VII/D.52-010

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
D: Wasserhaltige Phosphate, mit fremden Anionen
52: Mittelgroße und sehr große Kationen: Al-Mg und Ca-Na-K

Classification by Hölzel

8.DK.700

8: PHOSPHATES ARSENATES VANADATES
D: Phosphates (+Anions +Water)
K: very large=2 - very small-medium=2,3
7: Wallkilldellite-Group

Dana 8th edition

42.04.12.01

42: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
04: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen where (AB)5 (XO4)2 Zq · x(H2O)
12: Wallkilldellite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

dunkelrot

Streak color

hellorange

RI value α / ω / n

1.728

2V angle

Uniaxial (-)

Crystallography

Crystal System

hexagonal

Class (H-M)

6/mmm, 6mm, 6m2

Space Group number

194, 186, 190

Space Group

P63/mmc, P63mc, P62c

Cell parameters a (Å)

6.506

Cell parameters b (Å)

-

Cell parameters c (Å)

23.49

Cell parameters a/b or c/a

3.611

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

1

Volumne (ų)

861.077

X-Ray Powder Diffraction

11.5(100),
5.61(90),
4.56(40),
3.25(40),
2.844(60),
2.748(50),
2.545(50),
2.349(40)
XRD chart Wallkilldellite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

3

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.85

2.904 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

USA/New Jersey/Sussex Co./Franklin Mining District/Ogdensburg/Sterling Hill/Sterling Mine

Preface

Name from

dem Flusstal des Wallkill River (Wallkill Valley), in dem die Typlokalität Sterling Mine liegt

Author (Name, Year)

Dunn & Peacor, 1983

Additional Information

Von der IMA/CNMNC wurde kein Suffix für die Mangandominanz vergeben. Namen in der Form "Wallkilldellit-(Mn)" sind entsprechend fehlerhaft.

References

American Mineralogist 68 (1983),1029

Other languages

German

Wallkilldellit

Spanish

Wallkilldellita

French

Wallkilldellite

English

Wallkilldellite

Japanese

ｳｫｰﾙｷﾙﾃﾞﾙ石

Alternative Name

German

Wallkilldellit-(Mn)

Spanish

Wallkilldellita-(Mn)

English

Wallkilldellite-(Mn)

French

Wallkilldellite-(Mn)

English

Wallkilldellite-Mn

CNMNC (IMA)-Number

IMA 1982-084

CNMNC symbol

Symbol

Wlk

Locations with GPS information