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Johachidolite (Johachidolit)

Pictures (2 Images total)

Johachidolith
Views (File:
1572274536
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Johachidolith
Pyant Gyi Mine,Pein-Pyit,Mogok/Myanmar; Bildbreite ca.6 cm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: Myanmar (Burma)/Mandalay-Division/Pyin-Oo-Lwin, Distrikt/Mogok Township/Pein Pyit/Pyant Gyi Mine
Mineral: Johachidolite
Image: 1572274536
License: Usage for Mineralienatlas project only
Johachidolith

Pyant Gyi Mine,Pein-Pyit,Mogok/Myanmar; Bildbreite ca.6 cm
Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2019-10-28
Locality: Pyant Gyi Mine / Pein Pyit / Mogok Township / Pyin-Oo-Lwin, Distrikt / Mandalay-Division / Myanmar (Burma)
tafeliger hellbrauner Johachidolith
Views (File:
1606740380
): 188
tafeliger hellbrauner Johachidolith
Myanmar (Burma)/Mandalay-Division/Pyin-Oo-Lwin, Distrikt/Mogok Township/Pein Pyit, BB = 6,9 mm
Copyright: husi; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A043144, Donator: anatase2
Location: Myanmar (Burma)/Mandalay-Division/Pyin-Oo-Lwin, Distrikt/Mogok Township/Pein Pyit
Mineral: Johachidolite
Image: 1606740380
License: Usage for Mineralienatlas project only
tafeliger hellbrauner Johachidolith (SNr: A043144)

Myanmar (Burma)/Mandalay-Division/Pyin-Oo-Lwin, Distrikt/Mogok Township/Pein Pyit, BB = 6,9 mm
Collection: Lithothek der Münchener Micromounter
Copyright: husi
Contribution: Münchener Micromounter 2020-11-30
Locality: Pein Pyit / Mogok Township / Pyin-Oo-Lwin, Distrikt / Mandalay-Division / Myanmar (Burma)

You find additional Johachidolit specimen at the Geolitho Museum

Collectors Summary

Hardness (Mohs) 7.25
Solubility - Säuren, Königswasser
Crystal System orthorhombisch, Cmma

Chemism

Chemical formula

CaAlB3O7

Chemical composition

Aluminium, Calcium, Bor, Sauerstoff

Unit weight: 211.4910482 u; Number of atoms in the formula: 12

Info

Empirical formula:

CaAlB3O7

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Boron

B

15.34

3

25.00

10.8117000

32.4351000
Oxygen

O

52.96

7

58.33

15.9994300

111.9960100
Aluminium

Al

12.76

1

8.33

26.9815382

26.9815382
Calcium

Ca

18.95

1

8.33

40.0784000

40.0784000

Analysis wt%

Al2O3 : 24.10, CaO : 26.62, B2O3 : 49.38 (Ref: berechnet)

Strunz 9th edition incl. updates

6.CC.05

6: Borate
C: Triborate
C: Schicht (Phyllo)-Triborate
05:Johachidolith-Gruppe

Lapis Classification

V/L.03-010

V: NITRATE, CARBONATE UND BORATE
L: Gerüstborate mit [BO2] 1- bis [B12O24] 12-

Classification by Hölzel

6.CC.100

6: Borates
C: Triborates
C: Phyllotriborates
1: Johachidolite-Group - 3(3T)

Dana 8th edition

24.05.03.01

24: Borates - Anhydrous
05: Borates - Anhydrous with miscellaneous formulae

IMA status

Neudefinition von der CNMNC anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

max. Birefringence

0.014
Birefringence chart\! Johachidolite title=Birefringence chart Johachidolite

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

1.712

RI value β

1.717

RI value γ / ε

1.726

Ri mean

1.718

2V angle

Biaxial (+) 70°

Optical Data Luminescence

Color SW-UV (254nm)

  

blau

SW-UV Intensity

stark

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

67

Space Group

Cmma

Cell parameters a (Å)

7.968

Cell parameters b (Å)

11.724

Cell parameters c (Å)

4.374

Cell parameters a/b or c/a

0.680

Cell parameters c/b

0.373

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

408.605

X-Ray Powder Diffraction

3.989(20),
3.506(20),
2.632(100),
2.434(20),
2.001(20),
1.964(50),
1.820(30),
1.754(20)
XRD chart Johachidolite

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)

7.25

VHN (Hardness Vickers)

1450 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.45 (gemessen)

3.438 ( ρ calc. Mineralienatlas )

Instability

- Säuren, Königswasser

(Co-)Type locality

(Co-)Type locality

Nordkorea/Nord-Hamgyong, Provinz/Kilchu-gun/Changbaeng-myon/Sangpal-tong (Johachido)

Preface

Author (Name, Year)

Iwase & Saito, 1942

References

American Mineralogist 62 (1977), 327

Other languages

Spanish

Johachidolita

English

Johachidolite

French

Johachidolite

German

Johachidolith

Russian

Йохачидолит

Alternative Name

German

Johachidolit

Simplified Chinese

硼铝钙石

CNMNC symbol

Symbol

Jhd