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Esperite (Esperit)

Pictures (1 Images total)

Esperit
Views (File:
1568470681
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Esperit
Franklin,Franklin Mining District, Sussex Co., New Jersey
Copyright: Ulrich Baumgärtl; Contribution: Ulrich Baumgärtl
Collection: Ulrich Baumgärtl
Location: USA/New Jersey/Sussex Co./Franklin Mining District/Franklin
Mineral: Esperite
Image: 1568470681
License: Usage for Mineralienatlas project only
Esperit

Franklin,Franklin Mining District, Sussex Co., New Jersey

Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: Ulrich Baumgärtl 2019-09-14
Locality: Franklin / Franklin Mining District / Sussex Co. / New Jersey / USA

You find additional specimen at the Geolitho Museum

Collectors Summary

Color weiß
Streak color weiß
Hardness (Mohs) 5
Solubility ++ verdünnte HCl
Crystal System monoklin, P21/n

Chemism

Chemical formula

PbCa2(ZnSiO4)3

Chemical composition

Blei, Calcium, Silicium, Zink, Sauerstoff

Unit weight: 759.84475 u; Number of atoms in the formula: 21

Info

Empirical formula:

PbCa2(ZnSiO4)3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

25.27

12

57.14

15.9994300

191.9931600

Silicon

Si

11.09

3

14.29

28.0855300

84.2565900

Calcium

Ca

10.55

2

9.52

40.0784000

80.1568000

Zinc

Zn

25.82

3

14.29

65.4094000

196.2282000

Lead

Pb

27.27

1

4.76

207.2100000

207.2100000

Strunz 9th edition incl. updates

9.AB.15

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
B: Insel(Neso)silikate ohne weitere Anionen; Kationen in tetrahedraler [4] und größerer Koordination
15:Esperit-Gruppe

Lapis Classification

VIII/A.03-020

VIII: SILIKATE
A: Inselsilikate mit [SiO4] 4--Baugruppen
3: Kationen in tetraedrischer Koordination [49]

Classification by Hölzel

9.AA.240

9: SILICATES
A: Nesosilicates
A: Phenakite-Group

Dana 8th edition

51.02.01.03

51: Nesosilicate Minerals
02: Nesosilicates Nesosilicate Insular SiO4 Groups Only with cations in [4] as well as >[4]
01: Trimerite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß

Streak color

weiß

max. Birefringence

0.012

Birefringence chart\! Esperite title=Birefringence chart Esperite

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

1.762

RI value β

1.770

RI value γ / ε

1.774

Ri mean

1.769

2V angle

Biaxial (-) 40°

Optical Data Luminescence

Color LW-UV (365nm)

 

gelblich weiß

LW-UV Intensity

schwach

Color SW-UV (254nm)

 

gelb

SW-UV Intensity

sehr stark

SW-UV Observation Frequency

immer

Most Common Activator

Mn2+

Other Activators

Ce3+, Sm3+, Dy3+

Afterglow (Persistant Luminescence)

keine Daten

Thermoluminescence

vorhanden

Image ⇒ Luminescence ⇒ excitation ⇒ UV shortwave ~254nm (1 Images total)

Esperit
Views (File:
1401217872
): 904
Esperit
Deckungsgleiche Aufnahmen, derb weißlich; das UV-Bild (254nm) zeigt eine gelbgrüne Fluoreszenz für Esperit und rot für ?; BB = 15 mm. Fundort: Franklin, Franklin Mining District, Sussex Co., New Jersey, USA.
Copyright: Bebo; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A003861, Donator: Klaus Fleck
Location: USA/New Jersey/Sussex Co./Franklin Mining District/Franklin
Mineral: Esperite
Image: 1401217872
License: Usage for Mineralienatlas project only
Esperit (SNr: A003861)

Deckungsgleiche Aufnahmen, derb weißlich; das UV-Bild (254nm) zeigt eine gelbgrüne Fluoreszenz für Esperit und rot für ?; BB = 15 mm. Fundort: Franklin, Franklin Mining District, Sussex Co., New Je...

Collection: Lithothek der Münchener Micromounter
Copyright: Bebo
Contribution: Münchener Micromounter 2014-05-27
Locality: Franklin / Franklin Mining District / Sussex Co. / New Jersey / USA

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/n

Cell parameters a (Å)

8.789

Cell parameters b (Å)

8.269

Cell parameters c (Å)

15.254

Cell parameters a/b or c/a

1.063

Cell parameters c/b

1.845

Cell parameters α

90°

Cell parameters β

90.5

Cell parameters γ

90°

Z

4

Volume (ų)

1108.561

Crystal structure

beschrieben durch
Kimberly T. Tait, Hexiong Yang, Robert T. Downs, Chen Li, William W. Pinch: The crystal structure of esperite, with a revised chemical formula, PbCa2(ZnSiO4)3, isostructural with beryllonite. American Mineralogist 95 (2010) S. 699-705.

X-Ray Powder Diffraction

7.62(40),
3.363(20),
3.017(100),
2.958(20),
2.884(30),
2.534(70),
2.367(40),
1.944(40)

XRD chart Esperite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.28 (gemessen)

4.552 ( ρ calc. Mineralienatlas )

Instability

++ verdünnte HCl

Preface

Author (Name, Year)

Moore & Ribbe, 1965

References

American Mineralogist 50 (1965), 1170

Other languages

Dutch

Esperiet

German

Esperit

Spanish

Esperita

English

Esperite

French

Esperite

Russian

Эсперит

Alternative Name

English

Calcium-larsenite

CNMNC (IMA)-Number

IMA 1964-027

CNMNC symbol

Symbol

Epr

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 9JBsFDMEpEWt0Vko5ufnRQ
GUID (Global unique identifier) 146C90F4-0433-45A4-ADD1-5928E6E7E745
Database ID 1064