Classification of Orthojoaquinite-(La) |
| IMA status: | Approved |
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| 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 |
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| mindat.org URL: | http://www.mindat.org/min-10392.html Please feel free to link to this page. |
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Type Occurrence of Orthojoaquinite-(La) |
| Type Locality: | Narsaq stream pegmatite, Kvanefjeld Mt., Kuannersuit (Kvanefjeld) plateau, Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland |
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| General Appearance of Type Material: | As banded gneissic and irregular masses up to 4 x 3 x 1 cm, which consists of bent flakes 1 mm long |
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| Geological Setting of type material: | In the intermediate zone of nepheline-sodalite syenite pegmatites of the Ilímaussaq alkaline complex |
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| Associated Minerals at type locality: | |
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Physical Properties of Orthojoaquinite-(La) |
| Lustre: | Silky |
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| Diaphaneity (Transparency): | Transparent |
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| Colour: | Brown |
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| Hardness (Mohs): | 5 |
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| Cleavage: | Distinct/Good {001} |
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| Density (measured): | 4.1 g/cm3 |
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| Density (calculated): | 4.14 g/cm3 |
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| Comment: | measured by hydrostatic weighing |
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Crystallography of Orthojoaquinite-(La) |
| Crystal System: | Orthorhombic |
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Optical Data of Orthojoaquinite-(La) |
| Type: | Biaxial (+) |
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| RI values: | nα = 1.754 nβ = 1.760 nγ = 1.797 |
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| Maximum Birefringence: | δ = 0.043
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | High |
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| Dispersion: | distinct to strong |
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Chemical Properties of Orthojoaquinite-(La) |
| Formula: | | NaBa | | La | | Fe | | Ti | | [Si | | O | | ] | | O | | (O,OH) · H | | O |
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| Essential elements: | Ba, Fe, H, La, Na, O, Si, Ti |
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| All elements listed in formula: | Ba, Fe, H, La, Na, O, Si, Ti |
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Relationship of Orthojoaquinite-(La) to other Species |
| Member of: | Joaquinite Group |
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Other Members of Group:
- + | |
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Related Minerals - Nickel-Strunz Grouping):
- + | |
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Other Names for Orthojoaquinite-(La) |
| Synonyms: | |
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| Other Languages: | |
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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. |
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References for Orthojoaquinite-(La) |
Reference List:
- + | Semenow, E.I. et al. (1967): Rare Earths in minerals of the Joaquinite group, American Mineralogist, Vol. 52, 1762-1769
Matsubara, S., Mandarino, J., Semenov, E. (2001): Redefinition of a mineral in the Joaquinite group: Orthojoaquinite-(La), Canadian Mineralogist, Vol. 39, 757-760
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Internet Links for Orthojoaquinite-(La) |
| Search Engines: |
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| External Links: | Look for Orthojoaquinite-(La) on WebmineralLook for Orthojoaquinite-(La) on Athena MineralogyLook for Orthojoaquinite-(La) on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure Database |
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Localities for Orthojoaquinite-(La) |
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