03-25

03-25. Corundum #7.

Dandelion – corundum. Corundum structures on a bed of red dandelion, actually the repeating pattern of the branches joining the atoms in the structure

From a resource by d’Amour, Schiferl, Denner, Schulz & Holzapfel.

03-25

03-23

03-23. Corundum #5.

After a structural investigation of alpha-Al2O3 by  Ishizawa, Miyata, Minato, Marumo & Iwai. The arrangement of the atoms is so well composed – Nature does create perfect geometry!

03-23

03-22

03-22. Corundum #4.

The perfect double lozenge shape of that structure was a pleasure to work with! From a resource by H. Saalfeld – in German this time!

From a resource by H. Saalfeld – in German this time! Strukturuntersuchungen im system Al2O3-Cr2O3. Alumina & Chrome combine each other in an interesting fashion.

03-22

03-20

03-20. Corundum #2.

From a Finger & Hazen resource.  Crystal structure and compression of ruby to 46 kbar.

A magnificent structure. It could have inspired a classical marble bust. Interestingly, on the right side, the smaller corundum structure with its red atoms reminds me of a delicate Japanese Geisha porcelain doll.

03-20

03-19

03-19. Corundum #1.

Corundum is the mineral for week 12 of the 52 weeks tour of the Geometry of Nature.

The name corundum derives from the Sanskrit word kurundum or korund meaning “hard stone”. The corundum crystal structure is hexagonal and can look like bipyramidal hexagons and modified octahedrons.It is the hardest mineral found in nature after diamond and moissanite.

This mineral has been mined in many parts of the world for thousands of years in places like Burma, Cambodia, Sri Lanka, India, Afghanistan, and more recently in in Africa, in places like Madagascar, Kenya, Tanzania, among other.

03-19