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|Name:||Named by David London, Michael E. Zolensky, and Edwin Roedder in 1987 from the Greek διοσ "divine" and μιγνεν "mixture" because of the pronounced fluxing effects the compound has on hydrous granitic pegmatite fluids. The compound is also found in industrial processes and has been found in discarded commercial waste piles near factories or near shipping docks, land-fills, etc.|
Generally a microscopic mineral found in fluid inclusions in beryl or spodumene.
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:||18.104.22.168|
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:||1984|
Crystallography of Diomignite
|Cell Parameters:||a = 9.47Å, c = 10.27Å|
|Ratio:||a:c = 1 : 1.084|
|Unit Cell Volume:||V 921.02 Å³ (Calculated from Unit Cell)|
Optical Data of Diomignite
|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.
Chemical Properties of Diomignite
|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:|
Other Names for Diomignite
|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
LONDON, D., ZOLENSKY, M.E. & ROEDDER, E. (1987): Diomignite: natural Li2B4O7 from the Tanco pegmatite, Bernic Lake, Manitoba. Canadian Mineralogist 25, 173-180.
ANDERSON, A.J., CLARK, A.H. & GRAY, S. (2001): The occurrence and origin of zabuyelite (Li2CO3) in spodumene-hosted fluid inclusions: implications for the internal evolution of rare-element granitic pegmatites. Canadian Mineralogist 39, 1513-1527.
Acta Crystallographica: 15: 190-193.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Thomas, R., Davidson, P. (2010): Hambergite-rich melt inclusions in morganite crystals from the Muiane pegmatite, Mozambique and some remarks on the paragenesis of hambergite. Mineralogy and Petrology, 100, 3-4, 227-239
Internet Links for Diomignite
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.
(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.
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New Locality Added: Hartbeestfontein Mine, Pretoria, Gauteng Province, South AfricaFrom Debbie Woolf, 7th Dec 2013 02:21:23