Johachidolite Mineral Data

General Johachidolite Information

Chemical Formula:

CaAlB3O7

Composition:

Molecular Weight = 211.49 gm

Calcium 18.95 % Ca 26.52 % CaO

Aluminum 12.76 % Al 24.11 % Al₂O₃

Boron 15.33 % B 49.38 % B₂O₃

Oxygen 52.96 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaAl(B₃O₇)

Environment:

Nepheline dike cutting limestone.

IMA Status:

Valid Species (Pre-IMA) 1942

Locality:

Johachido district, Kankyo Hodu Prefecture, North Korea. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Johachidolite + Pronunciation

Synonym:

ICSD 10245

PDF 29-280

Johachidolite Image

Images:

Johachidolite

Comments: 0.91 carat round cut johachidolite gem.
Location: Byant Gyi, Pein Pyit, Mogok, Burma (Myanmar). Scale: Not Given.
© Adam Larson

Images:

Johachidolite

Comments: Yellowish orange crystal of johachidolite on matix (quartz, muscovite).
Location: Pein Pyit, Mogok, Mandalay Myanmar. Scale: Crystal Size: 1.2 Ã— 0.7 cm.
© Fabre Minerals

Johachidolite Crystallography

Axial Ratios:

a:b:c =0.6796:1:0.373

Cell Dimensions:

a = 7.968, b = 11.724, c = 4.374, Z = 4; V = 408.61 Den(Calc)= 3.44

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C mma

Physical Properties of Johachidolite

Cleavage:

None

Color:

Colorless, White.

Density:

3.37

Diaphaneity:

Transparent

Hardness:

7.5 - Garnet

Luminescence:

Fluorescent, Short UV=blue.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Johachidolite

Gladstone-Dale:

CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2088,KPDmeas= 0.2132,KC= 0.2117
Ncalc = 1.71 - 1.73

Optical Data:

Biaxial (+), a=1.712, b=1.717, g=1.726, bire=0.0140

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Johachidolite

Electron Density:

Bulk Density (Electron Density)=3.31 gm/cc
note: Specific Gravity of Johachidolite =3.37 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Johachidolite}= 2.89 barns/electron
U=PE_{Johachidolite} x rElectron Density= 9.59 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Johachidolite is Not Radioactive

Johachidolite Classification

Dana Class:

24.05.03.01 (24)Borates - Anhydrous

(24.05)with miscellaneous formulae

(24.05.03)Dana Group

24.05.03.01 Johachidolite CaAlB3O7 C mma 2/m 2/m 2/m

Strunz Class:

06.CC.05 06 - BORATES

06.C - Triborates

06.CC -Phyllo-triborates

06.CC.05 Johachidolite CaAlB3O7 C mma 2/m 2/m 2/m

Other Johachidolite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Johachidolite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Johachidolite Specimen Label here :

Johachidolite

CaAlB3O7
Dana No: 24.05.03.01 Strunz No: 06.CC.05
Locality:

Notes:

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