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Lemoynite

Named in honor of Charles Lemoyne, known as the Lord of Longuevil, and for his four sons who were well known in French-Canadian history. Lemyoynite is a rare mineral that can be found only at Mont Saint-Hilaire and the Demix quarry in Quebec, Canada, and at Wind Mountain in New Mexico, USA. In Canada it occurs in pegmatites in a gabbro-syenite and in crystal lined cavities in nepheline syenite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/lemoynite.pdf

Lenoblite

Named after Andre Lenoble, who was the former Head of the Laboratory of Mineralogy and Chief of Exploration for the French Atomic Energy Commission. Lenoblite is a rare mineral that occurs in a reduction zone below the oxidized zone of a uranium deposit at its type locality at Mounana mine in Gabon. Other localities include in Uzbekistan, and newer localities in Germany, Italy, and the United States.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/lenoblite.pdf

Lepidolite

Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Trioctahdera. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.

Lepidolite falls on or close to the Trilithionite - Polylithionite join and is a light mica with substantial lithium.  It contains fluorine in the (A) position. 

Found in complex zoned pegmatites.  Potassium is often replaced by Na, Rb, and Cs.

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