| 1. | It occurs as fibrous spheres and exhibits tetragonal crystal structure.
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| 2. | The crystal structure of zircon is tetragonal crystal system.
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| 3. | Carbon's crystal structure is tetragonal crystal structure.
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| 4. | It forms tetragonal crystals with perfect 001 cleavage.
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| 5. | The tetragonal crystals are sectile, and consequently was earlier known as corneous lead.
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| 6. | Both phases crystallise in the tetragonal crystal system and the structural differences are small.
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| 7. | It crystallizes in the tetragonal crystal system.
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| 8. | It crystallizes in the tetragonal crystal system and forms as rounded dissemations within tetrahedrite in quartz veins.
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| 9. | The tetragonal crystals are hemihedral with parallel faces ( like scheelite ), and at times of considerable size.
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| 10. | Its tetragonal crystals are a translucent blue, white, colorless or pink with a vitreous to dull lustre.
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