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Diomignite

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Formula:
Li
 
2
[B
 
4
O
 
7
]
System:Tetragonal
This page provides mineralogical data about Diomignite.

Classification of Diomignite

IMA status:Approved 1984
Strunz 8th edition ID:5/H.10-10
Nickel-Strunz 10th (pending) edition ID:6.DD.05

6 : BORATES
D : Tetraborates
D : Tekto-tetraborates
Dana 8th edition ID:24.5.4.1

24 : ANHYDROUS BORATES
5 : Miscellaneous
Hey's CIM Ref.:9.1.3

9 : Borates
1 : Borates of the alkalis and boric acid
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Type Occurrence of Diomignite

Type Locality:Tanco Mine (Bernic Lake Mine), Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada
Year of Discovery:1987

Crystallography of Diomignite

Crystal System:Tetragonal
Cell Parameters:a = 9.47Å, c = 10.27Å
Ratio:a:c = 1 : 1.084
Unit Cell Volume:V 921.02 ų (Calculated from Unit Cell)

Optical Data of Diomignite

Type:Uniaxial (-)
RI values: nω = 1.612 nε = 1.554
Maximum Birefringence:δ = 0.058

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Diomignite

Formula:
Li
 
2
[B
 
4
O
 
7
]
Essential elements:B, Li, O
All elements listed in formula:B, Li, O

Relationship of Diomignite to other Species

Related Minerals - Hey's Index Grouping:

- +
9.1.1Sassolite
H
 
3
BO
 
3
9.1.2Metaborite
HBO
 
2
9.1.4Biringuccite
Na
 
2
B
 
5
O
 
8
(OH) · H
 
2
O
9.1.5Nasinite
Na
 
4
B
 
10
O
 
17
 · 5H
 
2
O
9.1.6Kernite
Na
 
2
[B
 
4
O
 
6
(OH)
 
2
] · 3H
 
2
O
9.1.7Ezcurrite
Na
 
4
B
 
10
O
 
17
 · 7H
 
2
O
9.1.8Tincalconite
Na
 
2
(B
 
4
O
 
7
) · 5H
 
2
O
9.1.9Borax
Na
 
2
(B
 
4
O
 
5
)(OH)
 
4
 · 8H
 
2
O
9.1.10Ameghinite
Na(H
 
4
B
 
3
O
 
7
)
9.1.11Sborgite
Na[B
 
5
O
 
6
(OH)
 
4
] · 3H
 
2
O
9.1.12Aristarainite
Na
 
2
MgB
 
12
O
 
20
 · 8H
 
2
O
9.1.13Santite
K[B
 
5
O
 
6
(OH)
 
4
] · 2H
 
2
O
9.1.14Larderellite
(NH
 
4
)B
 
5
O
 
6
(OH)
 
4
9.1.15Ammonioborite
(NH
 
4
)
 
2
[B
 
5
O
 
6
(OH)
 
4
]
 
2
 · H
 
2
O
9.1.16Rhodizite
(K,Cs)Al
 
4
Be
 
4
(B,Be)
 
12
O
 
28

Other Names for Diomignite

Synonyms:
IMA1984-058a
Other Languages:
German:Diomignit
Spanish:Diomignita

Other Information

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 Diomignite

Reference List:

- +
Canadian Mineralogist (1987): 25: 173.

American Mineralogist (1988): 73: 928.

Acta Crystallographica: 15: 190-193.

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

Internet Links for Diomignite

Search Engines:
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    • External Links:
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  • Look for Diomignite on Athena Mineralogy
  • Look for Diomignite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Diomignite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Search for - Diomignite - on e-Rocks Mineral Sales & Auctions
  • Rare and Unusual minerals at Mineralogical Research Company
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    • Localities for Diomignite

    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.
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    (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.
    Canada
     
    • Manitoba
      • Lac-du-Bonnet area
        • Bernic Lake
    		Can.Min.(1987) 25, 173-180
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