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Johachidolite

Formula:
CaAlB
 
3
O
 
7
System:OrthorhombicColour:Colorless to whitish
Lustre:Hardness:
Name:Named for its type locality, Johachido District, North Korea, an obsolete Japanese colonial-era name for the locality.
This page provides mineralogical data about Johachidolite.

Classification of Johachidolite

IMA status:Approved
Explanation of status:Redefined in 1977
Strunz 8th edition ID:5/L.03-10
Nickel-Strunz 10th (pending) edition ID:6.CC.05

6 : BORATES
C : Triborates
C : Phyllo-triborates
Dana 8th edition ID:24.5.3.1

24 : ANHYDROUS BORATES
5 : Miscellaneous
Hey's CIM Ref.:10.1.16

10 : Borates with other anions
1 : Borates with halide
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Type Occurrence of Johachidolite

Type Locality:Sangpal-tong, Changbaeng-myon, Kilchu-gun, North Hamgyong Province, North Korea
General Appearance of Type Material:Grains and lamellar masses.
Geological Setting of type material:Nepheline dikes traversing limestone.

Physical Properties of Johachidolite

Diaphaneity (Transparency):Transparent
Colour:Colorless to whitish
Streak:White
Hardness (Mohs):
Fracture:Sub-Conchoidal
Density (measured):3.4 g/cm3

Crystallography of Johachidolite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Cmma {C2/m 2/m 2/a}
Cell Parameters:a = 9.767(2) Å, b = 11.723(3) Å, c = 4.3718(5) Å
Ratio:a:b:c = 0.833 : 1 : 0.373
Unit Cell Volume:V 408.3 ų
Z:4
Morphology:Occurs as grains and lamellar masses.

Optical Data of Johachidolite

Type:Biaxial (+)
RI values: nα = 1.712(2) nβ = 1.717(1) nγ = 1.726(1)
Maximum Birefringence:δ = 0.014

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:relatively strong r> v
Pleochroism:Non-pleochroic

Chemical Properties of Johachidolite

Formula:
CaAlB
 
3
O
 
7
Essential elements:Al, B, Ca, O
All elements listed in formula:Al, B, Ca, O

Relationship of Johachidolite to other Species

Related Minerals - Hey's Index Grouping:

- +
10.1.1Teepleite
Na
 
2
[Cl|B(OH)
 
4
]
10.1.2Bandylite
Cu[Cl|B(OH)
 
4
]
10.1.3Berborite
Be
 
2
[(OH,F)|BO
 
3
] · H
 
2
O
10.1.4Fluoborite
Mg
 
3
[(F,OH)
 
3
|BO
 
3
]
10.1.5Boracite
Mg
 
3
[Cl|B
 
7
O
 
13
]
10.1.6Karlite
Mg
 
7
[(OH,Cl)
 
5
|(BO
 
3
)
 
3
]
10.1.7Shabynite
Mg
 
5
[(Cl,OH)
 
2
|(OH)
 
5
|BO
 
3
] · 4H
 
2
O
10.1.8/9/10Hilgardite
Ca
 
2
B
 
5
O
 
9
Cl·H
 
2
O
10.1.11Solongoite
Ca
 
2
(H
 
3
B
 
3
O
 
7
)(OH)Cl
10.1.12Hydrochlorborite
Ca
 
4
B
 
8
O
 
15
Cl
 
2
·21H
 
2
O
10.1.13Ekaterinite
Ca
 
2
[(Cl,OH)
 
2
|B
 
4
O
 
7
] · 2H
 
2
O
10.1.14Volkovskite
KCa
 
4
[B
 
5
O
 
8
OH]
 
4
[B(OH)
 
3
]
 
2
Cl·4H
 
2
O
10.1.15Chelkarite
CaMgB
 
2
O
 
4
(Cl,OH)
 
2
·5H
 
2
O Or near, with Cl:OH = 3:1
10.1.17Satimolite
KNa
 
2
Al
 
4
[Cl|B
 
2
O
 
5
]
 
3
· 13H
 
2
O
10.1.18Chambersite
Mn
2+
3
[Cl|B
 
7
O
 
13
]
10.1.19Congolite
(Fe
2+
 
,Mg)
 
3
B
 
7
O
 
13
Cl
10.1.20Ericaite
Fe
2+
3
[Cl|B
 
7
O
 
13
]

Other Names for Johachidolite

Other Languages:
German:Johachidolit
Simplified Chinese:硼铝钙石
Spanish:Johachidolita

Other Information

Fluorescence in UV light:Intense blue fluorescence (UV) due to traces of REE's.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Johachidolite

Reference List:Iwase and Saito (1942) Sci. Papers Inst. Phys. Chem. Res., Tokyo: 39: 300.

American Mineralogist (1948): 33: 98.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 384.

American Mineralogist (1977): 62: 327-329.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Milen Kadiyski, Thomas Armbruster, Detlef Guenther, Eric Reusser,
Adolf Peretti. - Johachidolite, CaAl[B3O7], a mineralogical and
structural peculiarity. Eur. J. Mineral. 20, 965-973.

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    Localities for Johachidolite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Burma (Myanmar)
     
    • Mandalay Division
      • Sagaing District
    http://www.ruby-sapphire.com/r-s-bk-burma2.htm
    Knut Eldjarn specimen
        • Pein Pyit (Painpyit)
    Dr. Marcus Origlieri specimens
    North Korea
     
    • North Hamgyong Province
      • Kilchu-gun
        • Changbaeng-myon
    Iwase, E. and Saitou, N. (1942) Reports of Scientific Research Institute, 39, 1077.
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 7th Nov 2009 00:10:37