Tremolite-Actinolite

Jun 28th, 2015
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1. Relief - moderate 2. Colour - colourless - blue-green 3. RI - 1.599-1.705 4. Birefringence - 0.027-0.017 5. Interference colours - 2nd-3rd order, masked by the body colour 6. Extinction - inclined, complete

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Tremolite-ActinoliteAmphiboles; double-chain silicatesmonoclinic (-)Relief - moderateColour - colourless - blue-greenRI - 1.599-1.705Birefringence - 0.027-0.017Interference colours - 2nd-3rd order, masked by the body colourExtinction - inclined, completeCommentsHighly birefringent tremolite in marbleXPLGreecesubhedral basal sections of colourless tremolite with talcPPLwhiteschistsubhedral basal sections of colourless tremolite with talc. The field of view above under crossed polars.XPLwhiteschistc-axis parallel sections of acicular tremolite with talcPPL (left), XPL (right)whiteschistc-axis parallel sections of acicular tremolite with talcPPL (left), XPL (right)whiteschistActinolite schist with basal and c-axis parallel sections of blue-green actinolitePPLActinolite schist with blue-green actinolite, plus green biotite.PPL (left), XPL (right)whiteschist

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