Mineralpedia Details for Nakauriite

Named after the type locality at the Nakauri mine on Honshu Island, Japan. This rare mineral occurs as filling fractures in serpentinite at its type locality and on chromatite from serpentinite at a Scottish locality at Hagdale Quarry. Additional localities include the United States, Italy, and Austria. Nakauriite occurs associated with chrysotile, magnesite, artinite, pyroaurite, brochantite, malachite, callaghanite, hydromagnesite, antigorite, talc, quartz, theophrastite, pentlandite, and heazlewoodite.

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

Formula

Cu₈(SO₄)₄(CO₃)(OH)₆·48H₂O 

Crystal System

Orthorhombic 

Crystal Habit

Acicular, Fibrous, Microscopic Crystals 

Color

sky blue, light blue 

Class

Orthorhombic 

Hardness

- 

WebMineral

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Mindat

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Special Info

Type Locality

Blue crusts on serpentine matrix. This mineral has 48 water molecules and is a rather rare mineral worldwide. This is type locality.