Tobermorite Crystal Structure (IMAGE)
Caption
In nanoscale studies of calcium-silicate-hydrate, a binder critical to the strength and durability of Portland cement, the mineral tobermorite is a perfect stand-in for determining the crystal structure of this extraordinarily complex material. Highly structured layers of calcium and oxygen atoms alternate with "interlayers" of silicon, oxygen, calcium, and water molecules, where disorder may occur and adversely affect the material's properties.
Credit
Crystal structure of 14Å tobermorite as refined by Bonaccorsi et al
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