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Sample n° 6791
Minerals found in the sample
Mineral | Formula | Category | Subcategory | Importance |
---|---|---|---|---|
QUARTZ | SiO2 | tektosilicates | - | major |
MICROCLINE | K(AlSi3O8) | tektosilicates | feldspar | minor |
Description
Description:
block (7 cm) with prismatic crystals of clear and smoky quartz, white microcline crust
Origin
- Country: Portugal
- Region: Ifanes
- Locality:
Specification
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Donors: PolinardDonation year: 1954
-
Sampling year:Registration date:
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Quantity: 1Size: 2
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Dimension code 1>2>3: 2Quality code 1>2>3: 1
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Holotype: noParatype: noRadioactive: no
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Thin section: noChemical analysis: noX-Ray spectra: yes