Kaersutite - NaCa2(Mg3Ti4+Al)(Si6Al2)O22O2

Kaersutite is a member of the hornblende series together with oxyhornblende and katophorite. It was first described in 1884 and is named for Qaersut (formerly Kaersut), Umanq district in northern Greenland, near Skaergaard. Kaersutite is relatively rare but may be found in alkaline rocks such as trachyte, trachyandesite, syenite, monzonite and lugarite (rare alkaline sub-volcanic rock). It also appears in metasomatized mantle xenoliths.

Optical Properties:

Form: Long prismatic crystals showing strong pleochroism.
Relief: High.
Color: Brown, similar to Biotite.
Interference colors: Similar to Hornblende

Bibliography



• Optical Mineralogy : The Nonopaque Minerals by Phillips / Griffen
• E. WM. Heinrich (1956): Microscopic Petrografy. Mcgraw-hill book company,inc


Photo
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. XPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
lugarite(36).jpg

Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. XPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
lugarite(42).jpg

Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. XPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
lugarite(58).jpg

Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. XPL image, 2x (Field of view = 7mm)
lugarite(59).jpg

Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
lugarite(61).jpg

Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 2x (Field of view = 7mm)
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Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 10x (Field of view = 2mm)
lugarite(51).jpg

Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 10x (Field of view = 2mm)
lugarite(52).jpg

Kaersutite crystals in a Lugarite. Lugar Sill, Ayrshire, Scotland. PPL image, 10x (Field of view = 2mm)