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Ehrleite (Ehrleit)

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Ehrleit
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1636651983
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Ehrleit
farblose Ehrleitkristalle, Tip Top Mine, Fourmile, Custer Co., South Dakota, USA; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: USA/South Dakota/Custer County/Custer District/Fourmile/Tip Top Mine
Mineral: Ehrleite
Image: 1636651983
License: Usage for Mineralienatlas project only
Ehrleit

farblose Ehrleitkristalle, Tip Top Mine, Fourmile, Custer Co., South Dakota, USA; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2021-11-11
Locality: Tip Top Mine / Fourmile / Custer District / Custer County / South Dakota / USA

Collectors Summary

Color weiß, farblos
Streak color weiß
Hardness (Mohs) 3.5
Solubility +++ kalte HCl
Crystal System triklin, P1

Chemism

Chemical formula

Ca2ZnBe(PO4)2(PO3OH)·4H2O

Chemical composition

Beryllium, Calcium, Zink, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 512.5620689 u; Number of atoms in the formula: 32

Info

Empirical formula:

Ca2ZnBe(PO4)2(PO3OH)·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.77

9

28.13

1.0079470

9.0715230
Beryllium

Be

1.76

1

3.13

9.0121823

9.0121823
Oxygen

O

49.94

16

50.00

15.9994300

255.9908800
Phosphorus

P

18.13

3

9.38

30.9737612

92.9212836
Calcium

Ca

15.64

2

6.25

40.0784000

80.1568000
Zinc

Zn

12.76

1

3.13

65.4094000

65.4094000

Strunz 9th edition incl. updates

8.CA.10

8: Phosphate, Arsenate, Vanadate
C: Phosphate ohne weitere Anionen, mit H2O
A: Mit kleinen und großen/mittelgroßen [Kationen]
10:Ehrleit-Gruppe

Lapis Classification

VII/C.03-020

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
C: Wasserhaltige Phosphate, ohne fremde Anionen
3: Kleine und mittelgroße Kationen: Be und Al-Mn-Fe-Cu-Zn-Mg

Classification by Hölzel

8.CA.500

8: PHOSPHATES ARSENATES VANADATES
C: Phosphates (-Anions +Water)
A: Phosphates, C small

Dana 8th edition

40.05.06.01

40: Hydrated Phosphates, etc
05: Hydrated Phosphates, etc with miscellaneous formulae

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß, farblos

Streak color

weiß

max. Birefringence

0.024
Birefringence chart\! Ehrleite title=Birefringence chart Ehrleite

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

1.556

RI value β

1.560

RI value γ / ε

1.580

Ri mean

1.565

2V angle

Biaxial (+) 62°

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

7.130

Cell parameters b (Å)

7.430

Cell parameters c (Å)

12.479

Cell parameters a/b or c/a

0.960

Cell parameters c/b

1.680

Cell parameters α

94.32

Cell parameters β

102.7

Cell parameters γ

82.65

Z

2

Volume (ų)

638.852

X-Ray Powder Diffraction

12.41(70),
6.95(50),
6.58(30),
4.31(40),
3.161(100),
3.014(30),
2.723(60),
2.518(30)
XRD chart Ehrleite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.5

VHN (Hardness Vickers)

130 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.64 (gemessen)

2.664 ( ρ calc. Mineralienatlas )

Instability

+++ kalte HCl

(Co-)Type locality

(Co-)Type locality

USA/South Dakota/Custer County/Custer District/Fourmile/Tip Top Mine

Preface

Author (Name, Year)

Robinson & Grice & Van Velthuizen, 1985

References

Canadian Mineralogist 23 (1985), 507

Other languages

German

Ehrleit

French

Ehrleite

English

Ehrleite

Spanish

Ehrleíta

Russian

Эрлеит

CNMNC (IMA)-Number

IMA 1983-039

CNMNC symbol

Symbol

Ehr

Locations with GPS information

IDs

GUSID (Global unique identifier short form) uxZtwtMhVEOGLR5RpjjJVg
GUID (Global unique identifier) C26D16BB-21D3-4354-862D-1E51A638C956
Database ID 1007