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Bragança District, Portugal
© Martins da Pedra
A discontinued amphibole name.
Intermediate between the riebeckite group and the glaucophane group.
Originally described from North Berkeley, Alameda Co., California, USA.
Classification of Crossite
|IMA status:||Discredited 1997|
|Hey's CIM Ref.:||16.20.4|
16 : Silicates Containing Aluminum and other Metals
20 : Aluminosilicates of Fe, Mg and alkalis
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Physical Properties of Crossite
Optical Data of Crossite
|RI values:||nα = 1.640 - 1.659 nβ = 1.645 - 1.666 nγ = 1.652 - 1.670|
|2V:||Measured: 12° to 65°, Calculated: 72° to 82°|
|Maximum Birefringence:||δ = 0.012|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Relationship of Crossite to other Species
|Related Minerals - Hey's Index Grouping:|
Other Names for Crossite
|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 Crossite
Bernard E. Leake (1978): Nomenclature of amphiboles, American Mineralogist, Volume 63, pages 1023-1052
LEAKE, B.E.,WOOLLEY, A.R., ARPS, C.E.S., BIRCH, W.D., GILBERT, M.C., GRICE, J.D., HAWTHORNE, F.C., KATO, A.,KISCH, H.J., KRIVOVICHEV, V.G., LINTHOUT, K., LAIRD, J.,
MANDARINO, J.A., MARESCH, W.V., NICKEL, E.H., ROCK, N.M.S., SCHUMACHER, J.C., SMITH, D.C., STEPHENSON, N.C.N., UNGARETTI, L., WHITTAKER, E.J.W. & GUO,YOUZHI (1997): Nomenclature of amphiboles: report of the Subcommittee on Amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names. Can. Mineral. 35, 219-246.
Internet Links for Crossite
Localities for Crossite
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: Attu, Pargas (Parainen), Southwestern Finland Region, FinlandFrom Ilkka Mikkola, 24th May 2013 06:15:27