Kohler, "Nucleation and crystallization of otavite, witherite, calcite, strontianite
, hydrozincite and hydrocerussite by C[O.sub.2] membrane diffusion technique," Chemical Geology, vol.
For the Xinzhou thermal waters, the saturation states with respect to quartz, chalcedony, anhydrite, fluorite, and strontianite
tend to move closer to the equilibrium line (SI = 0) from approximately 105-180[degrees]C, at which temperatures these minerals are assumed to be in equilibrium with thermal waters, giving rise to the estimated reservoir temperature.
"Study of the structural properties of strontianite
SrCO3 under pressure," Universite/Laboratoire de Genie Civile, Algeria;
An especially rich assemblage of minerals was detected in the Nar-351.3 m bentonite, represented by several magmatic (magnetite, Ti-oxide, albite) and authigenic (pyrite, strontianite
, goyazite-florencite, kaolinite and illite) grains.
Strontium commonly occurs in nature, the 15th most abundant element on earth, averaging 0.034% of all igneous rock and is found chiefly as the form of the sulfate mineral celestite (SrS[O.sub.4]) and the carbonate strontianite
Also the Watzls had a few specimens, found in 2003, of another Austrian classic; strontianite
from the magnesite mine at Oberndorf-an-der-Laming, Styria.
Some chapters, such as the one on celestite and strontianite
, are only two pages long, listing their seven uses.
Ebenezer Emmons (1799-1863), a physician, chemist, agriculturalist, stratigrapher and paleontologist with the Geological Survey of New York, contributed the most specimens (46), including strontianite
(Emmons 1835), from the well-known localities in the Schoharie area of New York State (Fig.
Calcite (CaC[O.sub.3]) and strontianite
(SrC[O.sub.3]) were used as reference standards and the protocol was checked by using secondary standards containing both Ca and Sr.
Lines covered in the deal include salts, sulphur (except sublimed, precipitated and colloidal sulphur), natural graphite, quartz, silica and quartz sands, kaolin or other kaolinitic clays, bentonite, decolourising earths and Fuller's earth, fire-clay, andalusite, mullite, chamotte, microdol, natural calcium phosphates, natural barium sulphate, natural barium carbonate, gypsum, white asbestos, talc, natural arsenite, strontianite
(not stronitium oxide), natural cryolite and chiolite, fluorspar, vermiculite, perlite and chlorites (unexpanded), and others.
The cliffs,near Lavernock Point, at Penarth,are made of marl cut through by celestine and strontianite
The cliffs near Lavernock Point, Penarth are made of Marl cut through with Celestine and Strontianite