1 Physical Properties
1.1 Tenacity
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1.2 Solubility
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1.4 Durability
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1.7 Specific Gravity
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1
7.18
1.16 Fracture
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
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1.17 Cleavage
1.18 Mohs Hardness
1.19 Chemical Composition
Al 4(Ta,Nb) 3(O,OH,F) 14Ulrich Henn and Claudio C.
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