Rhabdophane

Formula: (Ce,La,Nd)PO4.H2O

Origin of name: from Greek for rod and to appear

 

Crystal system: hexagonal

Crystal class: 622

Twinning: 

Unit cell: 

 

Colour: 

Diaphaneity: 

Luster: 

Habit: acicular, in subparallel aggregates

Hardness: 3.5

Specific gravity: 3.94 to 3.97

Cleavage: 

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: three distinct species with extensions -(Ce), -(La) and -(Nd) indicating the predominant rare earth cation in composition

 

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