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Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
© Elmar Lackner 2009
|Hardness:||5 - 5½|
This page provides mineralogical data about Joaquinite-(Ce).
Classification of Joaquinite-(Ce)
|Strunz 8th edition ID:||8/E.08-80|
|Nickel-Strunz 10th (pending) edition ID:||9.CE.25|
9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
|Dana 8th edition ID:||60.1.1a.1|
60 : CYCLOSILICATES Four-Membered Rings
1 : Four-Membered Rings, as Titanosilicates
|Hey's CIM Ref.:||14.9.12|
14 : Silicates not Containing Aluminum
9 : Silicates of Ti
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Type Occurrence of Joaquinite-(Ce)
|Type Locality:||Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA|
Physical Properties of Joaquinite-(Ce)
|Hardness (Mohs):||5 - 5½|
Optical Data of Joaquinite-(Ce)
|RI values:||nα = 1.748 - 1.754 nβ = 1.760 - 1.767 nγ = 1.762 - 1.823|
|Maximum Birefringence:||δ = 0.014 - 0.069|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Dispersion:||r < v marked|
Chemical Properties of Joaquinite-(Ce)
|Essential elements:||Ba, Ce, Fe, H, Na, O, Si, Ti|
|All elements listed in formula:||Ba, Ce, F, Fe, H, Na, O, Si, Ti|
Relationship of Joaquinite-(Ce) to other Species
|Member of:||Joaquinite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Joaquinite-(Ce)
|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 Joaquinite-(Ce)
Palache, Charles & William Frederick Foshag (1932), The chemical nature of joaquinite: American Mineralogist: 17: 308-312.
Cannillo, E., F. Mazzi & G. Rossi (1972), The structure type of joaquinite: Tschermaks Mineralogische und Petrographische Mitteilungen: 17: 233-246.
American Mineralogist (1967): 52: 1762-1769.
Laird, J. & A.L. Albee (1972): Chemical composition and physical, optical, and structural properties of benitoite, neptunite and joaquinite: American Mineralogist: 57: 85-102.
Dowty, E. (1975): Crystal structure of joaquinite: American Mineralogist: 60: 872-878.
Rossman, G.R. (1975) Joaquinite: the nature of its water content and the question of four-coordinated ferrous iron. American Mineralogist: 60: 435-440.
American Mineralogist: 67: 809-816.
Internet Links for Joaquinite-(Ce)
|Specimens:||The following Joaquinite-(Ce) specimens are currently listed for sale on minfind.com.|
Localities for Joaquinite-(Ce)
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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Locality Updated: Amazonite pegmatite, Laitila, Southwestern Finland Region, FinlandFrom Ilkka Mikkola, 4th Dec 2013 23:11:27