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Tellurium (Photo)

Year of discovery: 1783 (Mariahilf mine, Romania), 1916 (Japan)

Locality list: 9 localities of tellurium

• Te
• [Te]

• Class: Native elements
• Soluble in: concentrated H₂SO₄

• Te => Se: Selenium

• Color: Silver white
• Streak: Gray
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Hexagonal prismatic, Acicular elongated to [0001] with rhombohedral termination. Similar to quartz
• Aggregate: Columnar

• Cleavage: Perfect on {1010} (3 planes), Imperfect on {0001} (1 plane)
• Hardness: 2-2.5
• Density: 6.2

• System: Hexagonal
• Group: 32, P3₁21
• Lattice: a=4.5, c=5.9

Etymology: Tellus (Earth) in Latin

Synonym: Native tellurium