Graphite is definitively the material of architects, draughtsmen, and artists. I wonder how they found each other.
This visualization of a graphite crystal unit is made of 3358 atoms, 0 bonds, 0 polyhedra.
From a resource by J. Favos
The graphite crystal has such an elegant minimal symmetry, it brings to mind mathematician Sierpinski fractal visualization, in particular, the triangle series called the Sierpinski gasket.
From a resource by R. Wyckoff.
10-29. Graphite #1.
Graphite – not sexy, but very timely to celebrate Halloween and the Day of the Dead. German mineralogist Abraham Gottlob Werner gave it its name in 1789 after the ancient Greek word for write – or draw.
Graphite is the choice mineral of designers and draughtsmen. More than a million tons of graphite were extracted in the world in 2016. Around 7% of the 1.1 million tonnes produced in 2011 was used to make pencils. Quite an interesting fact in the age of text-messaging!
Graphite is the most stable form of carbon and has a unique layered, planar structure. The individual layers are called graphene. In each layer, the carbon atoms are arranged in a honeycomb lattice. Its system is hexagonal and its symmetry P6.
In the 4th millennium B.C., during the Neolithic Age, the Mariţa culture in southeastern Europe, already used graphite to decorate pottery. It has been used ever since to produce wonderful art on clay, paper, textile, and all material that support and fix graphite.
- 10-28. Celestine #7.
- For some reason I had it ready to go and forgot to upload that day. I will leave the chronology of this site as is – and make the visual available in the upcoming book as a bonus! The resource was from R. James, and it made for a nice display too…
- 10-27. Celestine #6.
Celestine in the sky.
A variation on the structure of a Celestine crystal from Montecchio Maggiore, Vicenza, Italy.
Resource by Brigatti, Galli, and Medici.
10-26. Celestine #5.
Celestine atoms coming out of their cube.
From a resource by Garske & Peacor
10-25. Celestine #4.
The Celestine crystal symmetry stands like an alien or very ancient code at times… Pretty to look at, difficult to decipher.
From a resource by Jacobsen, Smyth, Swope, and Downs.
10-24. Celestine #3.
Celestines often live and grow in geodes. It seems to be in their DNA, artwise, as it is a recurring presence in all the sketches I go through.
From a resource by Hawthorne and Ferguson
10-23. Celestine #2.
A Celestine from Madagascar.
From a resource by S. Antao.
10-22. Celestine #1.
Cyrilovite, Celestine – minerals come in nice and exotic names sometimes!
Celestine, – or celestite as it is also called, is a playful mineral often found trapped in geodes. Which is strange since it gets its name from Latin – Celestis or sky. Maybe it’s bluish glow, or maybe because the strontium in it is used in fireworks?
Celestine can be found in small quantities, pretty much all around the world. Its crystal belongs to the orthorhombic system and its symmetry is Pnma. The biggest one so far is 18 inches wide and weigh 300 pounds. A piece of the sky fell to earth!
Its chemical profile is SrSO4. So, here is a Celestine Haiku, thanks to the ingenious periodic table of scientist and poet Mary Soon Lee.
I strive for indépendance
Sweet days are long gone
Yet, I still can’t spell your name
Visualization from a resource by Miyake, Minato, Morikawa, and Iwai
10-21. Cyrilovite #7.
Lovely but perplexing crystal. Definitely worth an exhibit a modern Viennese gallery though.