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Winchite

A species of Minerals, Also known as Eckrite

Hardness:

5.5

General Info About Winchite

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Physical Properties of Winchite

Colors

Cobalt-blue to violet-blue, lavender-gray, gray, colorless

Streak

Pale blue-grey

Hardness

5.5 , Soft

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Chemical Properties of Winchite

Formula

☐{CaNa}{Mg₄Al}(Si₈O₂₂)(OH)₂

The winchite-group minerals are defined as sodium-calcium amphiboles with A(Na+K+ 2Ca)<0.5 apfu and with C(Al+Fe³⁺+2Ti)<1.5 apfu. The W position may contain (OH),F or Cl.

Winchite is defined with

C²⁺ position: Mg dominant

C³⁺ position: Al dominant

W position: (OH) dominant.

Elements listed

Al, Ca, H, Mg, Na, O, Si

Common Impurities

Ti,Mn,Na,K