| 1. | The mine had a " tremendously rich lode of uranium pitchblende.
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| 2. | Deeper ore is pitchblende and coffinite with abundant pyrite and marcasite.
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| 3. | In 1789 the chemical element uranium was discovered in pitchblende from Johanngeorgenstadt.
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| 4. | The uranium occurs as pitchblende in a hydrothermal vein deposit in Precambrian granite.
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| 5. | Primary mineralization consists of pitchblende and coffinite, with weathering producing secondary mineralization.
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| 6. | Lenses of massive pitchblende occur locally with a width of over 1 m.
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| 7. | Giesel isolated from pitchblende a lanthanum-containing fraction which showed unique properties.
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| 8. | Working with the mineral pitchblende, the pair discovered a new radioactive element in 1898.
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| 9. | Marie Curie began her investigations by testing a uranium ore called pitchblende with an electrometer.
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| 10. | Pitchblende is a complex mineral; the chemical separation of its constituents was an arduous task.
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