from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of a series of variously colored, often fluorescent mineral silicates of aluminum, calcium, and sodium.
from The Century Dictionary.
- noun One of a group of minerals, silicates of aluminium and calcium, with sometimes sodium, also often containing chlorin in small amount.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Mon.) A grayish white mineral occuring in tetragonal crystals and in cleavable masses. It is essentially a silicate of alumina and soda.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy Any of several mixed
sodiumand calcium aluminosilicateswhich also contain chloride, carbonateand sulfateand are found in metamorphic rocks
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
The south-western group consists of metasediments, charnokites and scapolite-bearing calc-granulites, while the highland group comprises khondalites of metamorphosed sediments and charnokites.
Most significant is the presence of the Sinharaja Basic Zone, consisting of hornblende, pyriclasts, basic charnokites, pyroxene amphibolites and scapolite-bearing calc-granulites and blended with small amounts of quartzites, garnet-biotite gneisses and intermediate charnokites.
The severe crushing to which the rock has been subjected has resulted in the conversion of the plagioclase into scapolite and also in the formation of zoisite by the characteristic alteration of the lime bearing silicate of the feldspar in conjunction with other constituents of the rock.