Mineral site, and from there further subdivided by the chemistry of the W site. The Y and Z sites can accommodate a variety of cations, especially various transition metals; this variability in structural transition metal content gives the tourmaline group greater variability in colour. Other cyclosilicates include beryl, AlBeSiO, whose varieties include the gemstones emerald (green) and aquamarine (bluish). Cordierite is structurally similar to beryl, and is a common metamorphic mineral. Sorosilicates, also termed disilicates, have tetrahedron-tetrahedron bonding at one oxygen, which results in a 2:7 ratio of silicon to oxygen. The resultant common structural element is the [SiO] group. The
Aquamarine Power 2009 Aquamarine Power announced an investment of £11m in the business. The principal investor during this investment round was ABB Group who invested £8m. The other investors during the round included Scottish and Southern Energy who invested £2.7m with other historical investors making up the balance of £300k. The investors in the business include: ABB, SSE, Sigma Capital Group, Scottish Enterprise and others. Aquamarine Power won several awards. In 2008 it was named Emerging Technology Promoter of the Year by Ernst & Young Euromoney Global Renewable Energy Awards. In 2009, it was named Innovator of the Year by the British