Classification of Horváthite-(Y) |
| IMA status: | Approved 1996 |
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| Strunz 8th edition ID: | 5/C.07-62
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| Nickel-Strunz 10th (pending) edition ID: | 5.BD.40
5 : CARBONATES (NITRATES) B : Carbonates with additional anions, without H2O D : With rare earth elements (REE) |
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| Dana 7th edition ID: | 16.1.11.1 |
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| mindat.org URL: | http://www.mindat.org/min-6999.html Please feel free to link to this page. |
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Type Occurrence of Horváthite-(Y) |
| Type Locality: | Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Canada |
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| Geological Setting of type material: | From a pegmatite dike |
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Physical Properties of Horváthite-(Y) |
| Lustre: | Vitreous |
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| Hardness (Mohs): | 4 |
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| Cleavage: | Very Good [100] Very Good, [010] Good |
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| Fracture: | Irregular/Uneven |
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| Density (measured): | 3.58 g/cm3 |
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| Density (calculated): | 3.46 g/cm3 |
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Crystallography of Horváthite-(Y) |
| Crystal System: | Orthorhombic |
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| Class (H-M): | mmm (2/m 2/m 2/m) - Dipyramidal |
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| Space Group: | Pmmn (P21/m 21/m 2/n) |
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| Cell Parameters: | a = 6.964Å, b = 9.173Å, c = 6.302Å
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| Ratio: | a:b:c = 0.759 : 1 : 0.687 |
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| Unit Cell Volume: | V 402.58 ų |
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| Z: | 4 |
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Optical Data of Horváthite-(Y) |
| Type: | Biaxial (-) |
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| RI values: | nα = 1.457 nβ = 1.543 nγ = 1.622 |
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| 2V: | Measured: 82° , Calculated: 82° |
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| Maximum Birefringence: | δ = 0.165
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | Low |
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| Dispersion: | none |
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Chemical Properties of Horváthite-(Y) |
| Formula: | |
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| Essential elements: | C, F, Na, O, Y |
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| All elements listed in formula: | C, F, Na, O, Y |
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Relationship of Horváthite-(Y) to other Species |
| Related Minerals - Nickel-Strunz Grouping): | |
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Other Names for Horváthite-(Y) |
| Synonyms: | |
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| Russian names: | |
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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 Horváthite-(Y) |
| Reference List: | Mineralogical Magazine (1997): 61: 733.
Mineralogical Record: 29: 236.
Canadian Mineralogist: 35: 743-749.
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Internet Links for Horváthite-(Y) |
| Search Engines: |
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| External Links: | Look for Horváthite-(Y) on WebmineralLook for Horváthite-(Y) on Athena MineralogyLook for Horváthite-(Y) on WikipediaLook for Horváthite-(Y) on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Horváthite-(Y) in the Natural History Museum (London) online catalogueHorváthite-(Y) details from Handbook of Mineralogy (PDF) |
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Localities for Horváthite-(Y) |
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