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

Johnbaumite (Johnbaumit)

Pictures (2 Images total)

Johnbaumit
Views (File:
1302790087
): 1135
Johnbaumit
Bildbreite: ca. 1 cm, Fundort: Jakobsberg, Nordmark, Filistad, Värmland, Schweden
Copyright: Dan Weinrich; Contribution: thdun5
Location: Schweden/Värmland, Provinz/Filipstad, Gemeinde/Nordmark (Nordmarksberg)/Jakobsberg
Mineral: Johnbaumite
Image: 1302790087
License: Usage for Mineralienatlas project only
Johnbaumit

Bildbreite: ca. 1 cm, Fundort: Jakobsberg, Nordmark, Filistad, Värmland, Schweden
Copyright: Dan Weinrich
Contribution: thdun5 2011-04-14
Locality: Jakobsberg / Nordmark (Nordmarksberg) / Filipstad, Gemeinde / Värmland, Provinz / Schweden
Katoptrit und Johnbaumit
Views (File:
1413914614
): 1364
Katoptrit und Johnbaumit
Jakobsberg, Nordmark, Filipstad, Värmland, Schweden.
Copyright: Doc Diether; Contribution: Doc Diether
Collection: Universität Clausthal
Location: Schweden/Värmland, Provinz/Filipstad, Gemeinde/Nordmark (Nordmarksberg)/Jakobsberg
Mineral: Johnbaumite, Katoptrite
Image: 1413914614
Rating: 1 (votes: 1)
License: Usage for Mineralienatlas project only
Katoptrit und Johnbaumit

Jakobsberg, Nordmark, Filipstad, Värmland, Schweden.
Collection: Universität Clausthal
Copyright: Doc Diether
Contribution: Doc Diether 2014-10-21
Locality: Jakobsberg / Nordmark (Nordmarksberg) / Filipstad, Gemeinde / Värmland, Provinz / Schweden

Collectors Summary

Color farblos, weiß
Streak color weiß
Hardness (Mohs) 4.5
Crystal System hexagonal, P63/m

Additional information / Summary

Ein bekannter Polytyp Johnbaumit-M

Chemism

Chemical formula

Ca5(AsO4)3(OH)

Chemical composition

Arsen, Calcium, Sauerstoff, Wasserstoff

Unit weight: 634.157343 u; Number of atoms in the formula: 22

Info

Empirical formula:

Ca5(AsO4)3(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.16

1

4.55

1.0079470

1.0079470
Oxygen

O

32.80

13

59.09

15.9994300

207.9925900
Calcium

Ca

31.60

5

22.73

40.0784000

200.3920000
Arsenic

As

35.44

3

13.64

74.9216020

224.7648060

Analysis wt%

CaO : 43.50, P2O5 : 1.70, As2O5 : 52.20, H2O : 1.30 (Ref: American Mineralogist 80)

Strunz 9th edition incl. updates

8.BN.05

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
N: Mit ausschließlich [Kationen] (OH, etc.):RO4 = 0.33:1
05:Apatit-Gruppe

Lapis Classification

VII/B.39-080

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
B: Wasserfreie Phosphate, mit fremden Anionen F,Cl,O,OH
39: Mittelgroße und große Kationen: Mg-Cu-Zn und Ca-Na-K-Ba-Pb; Apatit-Gruppe

Classification by Hölzel

8.BO.160

8: PHOSPHATES ARSENATES VANADATES
B: Phosphates (+Anions -Water)
O: Apatite Supergroup
1: Apatites with Ca,Sr,Ba

Dana 8th edition

41.08.03.03

41: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
08: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen where (A)5 (XO4)3 Zq
03: Svabite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Apatite Supergroup  ⇒ Apatite group

Optical Properties

Color

farblos, weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.003
Birefringence chart\! Johnbaumite title=Birefringence chart Johnbaumite

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

1.687

RI value γ / ε

1.684

Ri mean

1.686

2V angle

Uniaxial (-)

Optical Data Luminescence

Luminescence

fluoreszierend, Kurzwelliges UV=rosa orange

Color SW-UV (254nm)

  

dunkelorange gelbbraun

SW-UV Intensity

schwach

SW-UV Other Colors

          

gelb, orangegelb, orange, grün, lilarosa

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

hexagonal

Class (H-M)

6/m

Space Group number

176

Space Group

P63/m

Cell parameters a (Å)

9.70

Cell parameters b (Å)

-

Cell parameters c (Å)

6.93

Cell parameters a/b or c/a

0.714

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volumne (ų)

564.686

Kristall structure

C. M. B. Henderson, K. S. Knight: Synchrotron X-ray absorption spectroscopy and X-ray powder diffraction studies of the structure of johnbaumite [Ca10(AsO4)6(OH,F)2] and synthetic Pb-, Sr- and Ba-arsenate apatites and some comments on the crystal chemistry of the apatite structure type in general. Mineralogical Magazine Vol. 73 (2009) S. 433–455. Erratum dazu in Mineralogical Magazine Vol. 75 (2011) S. 267.

X-Ray Powder Diffraction

3.98(50),
3.47(50),
2.895(100),
2.820(70),
2.798(70),
2.683(40),
2.034(40),
1.879(40)
XRD chart Johnbaumite

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

Polytypes

Johnbaumite-M

Ca5(AsO4)3OH

monoklin

P21/m

2/m

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4.5

VHN (Hardness Vickers)

280 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.65

3.729 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

USA/New Jersey/Sussex Co./Franklin Mining District/Franklin/Franklin Mine

Preface

Author (Name, Year)

Dunn & Peacor & Newberry, 1980

References

American Mineralogist 65 (1980), 1143

Nomenclature of the apatite supergroup minerals - European Journal of Mineralogy 22 (2010), 163–179

IMA group assignments

Other languages

German

Johnbaumit

Spanish

Johnbaumita

English

Johnbaumite

French

Johnbaumite

Russian

Джонбаумит

CNMNC (IMA)-Number

IMA 1980-B

CNMNC symbol

Symbol

Jbm

Locations with GPS information