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Armalcolite


Armalcolite : (Mg,Fe2+)Ti2O5
minID: NRR-AG0

Photo Copyright © Tony Peterson  - This image is copyrighted. Unauthorized reproduction prohibited.
Field of View: 0.5 mm
Largest Crystal Size: 0.2 mm

FOV=0.5 mm. Armalcolite is present as black, metallic rectangular prisms and needles. The photo is of a naturally weathered surface of a phlogopite-sanidine-leucite lamproite lava, revealing the mechanically resistant armalcolite crystals. The lava is non-vesicular so there were no void spaces for crystals to grow into - this is the only means to observe unbroken armalcolites in this rock, aside from severe chemical dissolution. Collection and photo, T. Peterson.

SEM/backscattered electron and thin section images have been uploaded separately.

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Photo added: 27th Dec 2009

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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