Its crystal structure may allow it to replace silicon in silicate minerals.

A pilot scheme is near finalization for bauxite alumina aluminium.

For Jamaica, bauxite and alumina are the mainstay of the economy.

Akimotoite is a rare silicate mineral ((Mg,Fe)SiO3) in the ilmenite group of minerals.

Alumina and bauxite are the main products exported, followed by sugar, bananas and rum.

Venezuela is the source of bauxite ore which is used in the production of alumina.

Bauxite and alumina production increased 5.5 from January to December, 1998 compared to the corresponding period in 1997.

Reservoirs By far the largest reservoir of Earth's oxygen is within the silicate and oxide minerals of the crust and mantle (99.5 ).

1949 Sumitomo Chemical takes over the aluminum business of Sumitomo Aluminium Smelting Co., starting the integrated production of aluminum from alumina.

The growth was fuelled by strong private investments in bauxite alumina, tourism, manufacturing industry and, to a lesser extent, the agricultural sector.

Jaffeite is an hydrated calcium silicate with the following chemical formula Ca6Si2O7(OH)6 Occurrence The mineral was first found at the Kombat Mine in Namibia.

January's bauxite production recorded a 7.1 increase relative to January 1998 and continued expansion of alumina production through 2009 is planned by Alcoa.

After loss of volatile gases, as well as carbon and sulfur via reaction with hydrogen, this silicate mixture of elements formed most of the Earth's crust.

54. The Territory apos s foreign trade continued to be dominated by petroleum products and by alumina since resumption of its production in 1990.

Mantle convection is the slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior of the Earth to the surface.

Over 90 of the Earth's crust is composed of silicate minerals, making silicon the second most abundant element in the Earth's crust (about 28 by mass) after oxygen.

60. The Territory apos s trade industry continued to be dominated by petroleum products and, since 1990, by the resumption of the production of alumina.

The typical chemical composition of oven dried diatomaceous earth is 80 to 90 silica, with 2 to 4 alumina (attributed mostly to clay minerals) and 0.5 to 2 iron oxide.

Mineral commodities to be studied include bauxite alumina aluminium in Brazil, Indonesia and Jamaica, gold in Ghana, Zimbabwe and a third country to be decided and copper (countries yet to be decided).

(a) Annual and quarterly statistical bulletins on tungsten and tin annual and, with the assistance of a trust fund, quarterly statistical publications on iron ore and annual statistics on bauxite alumina aluminium (all the issues for 1993 have been published)

The political crisis which Suriname went through in the 1980s, and Suriname apos s related isolation from the important donors, caused a serious decline in the economic development of the country, which was further aggravated by the drastic reduction of the country apos s income from its main export products more specifically, alumina and aluminium.

In a letter to the Caribbean Fisheries Management Council, on behalf of the fishermen, Senator Mary Ann Pickard pointed out that the fishermen depended on fishing in that area because the fishing grounds in the south of the island had been closed by the Hess Oil Virgin Islands Corporation (HOVIC) and the Virgin Islands Alumina Company (VIALCO).