Silvialite, a new sulfate-dominant member of the scapolite group with an Al-Si composition near the I4/m−P42/n phase transition
Silvialite, ideally Ca Al Si SO , is tetragonal, I4/m, Z = 2, with a = 12.160(3), c = 7.560(1) Å, V = 1117.9(8) Å , c:a = 0.6217:1, ω= 1.583, Ɛ= 1.558 (uniaxial negative), D = 2.75 g/cm , D = 2.769 g/cm and H (Mohs) = 5.5. It is transparent and slightly yellow, has a good {100} cleavage, chonchoidal...
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| Veröffentlicht in: | Mineralogical magazine 1999-06, Vol.63 (3), p.321-329 |
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| container_title | Mineralogical magazine |
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| creator | Teertstra, D. K. Schindler, M. Sherriff, B. L. Hawthorne, F. C. |
| description | Silvialite, ideally Ca
Al
Si
SO
, is tetragonal, I4/m, Z = 2, with a = 12.160(3), c = 7.560(1) Å, V = 1117.9(8) Å
, c:a = 0.6217:1, ω= 1.583, Ɛ= 1.558 (uniaxial negative), D
= 2.75 g/cm
, D
= 2.769 g/cm
and H (Mohs) = 5.5. It is transparent and slightly yellow, has a good {100} cleavage, chonchoidal fracture, white streak and a vitreous lustre. It occurs in upper-mantle garnet-granulite xenoliths hosted by olivine nephelinite, from McBride Province, North Queensland, Australia. The empirical formula, derived from electron-microprobe analysis, is (Na
Ca
)(Al
Si
)O
[(SO
)0.57(CO
]. Crystal-structure refinement shows disordered carbonate and sulfate groups along the fourfold axis. Silvialite is a primary cumulate phase precipitated from alkali basalt at 900−1000°C and 8−12 kbar under high f
and f
. The name silvialite, currently used in literature to describe the sulfate analogue of meionite, was suggested by Brauns (1914). |
| doi_str_mv | 10.1180/002646199548547 |
| format | Article |
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Al
Si
SO
, is tetragonal, I4/m, Z = 2, with a = 12.160(3), c = 7.560(1) Å, V = 1117.9(8) Å
, c:a = 0.6217:1, ω= 1.583, Ɛ= 1.558 (uniaxial negative), D
= 2.75 g/cm
, D
= 2.769 g/cm
and H (Mohs) = 5.5. It is transparent and slightly yellow, has a good {100} cleavage, chonchoidal fracture, white streak and a vitreous lustre. It occurs in upper-mantle garnet-granulite xenoliths hosted by olivine nephelinite, from McBride Province, North Queensland, Australia. The empirical formula, derived from electron-microprobe analysis, is (Na
Ca
)(Al
Si
)O
[(SO
)0.57(CO
]. Crystal-structure refinement shows disordered carbonate and sulfate groups along the fourfold axis. Silvialite is a primary cumulate phase precipitated from alkali basalt at 900−1000°C and 8−12 kbar under high f
and f
. The name silvialite, currently used in literature to describe the sulfate analogue of meionite, was suggested by Brauns (1914).</description><identifier>ISSN: 0026-461X</identifier><identifier>EISSN: 1471-8022</identifier><identifier>DOI: 10.1180/002646199548547</identifier><language>eng</language><publisher>De Gruyter</publisher><subject>Australia ; electron-microprobe data ; meionite ; new mineral ; Queensland ; scapolite ; silvialite ; sulfate ; X-ray data</subject><ispartof>Mineralogical magazine, 1999-06, Vol.63 (3), p.321-329</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Teertstra, D. K.</creatorcontrib><creatorcontrib>Schindler, M.</creatorcontrib><creatorcontrib>Sherriff, B. L.</creatorcontrib><creatorcontrib>Hawthorne, F. C.</creatorcontrib><title>Silvialite, a new sulfate-dominant member of the scapolite group with an Al-Si composition near the I4/m−P42/n phase transition</title><title>Mineralogical magazine</title><description>Silvialite, ideally Ca
Al
Si
SO
, is tetragonal, I4/m, Z = 2, with a = 12.160(3), c = 7.560(1) Å, V = 1117.9(8) Å
, c:a = 0.6217:1, ω= 1.583, Ɛ= 1.558 (uniaxial negative), D
= 2.75 g/cm
, D
= 2.769 g/cm
and H (Mohs) = 5.5. It is transparent and slightly yellow, has a good {100} cleavage, chonchoidal fracture, white streak and a vitreous lustre. It occurs in upper-mantle garnet-granulite xenoliths hosted by olivine nephelinite, from McBride Province, North Queensland, Australia. The empirical formula, derived from electron-microprobe analysis, is (Na
Ca
)(Al
Si
)O
[(SO
)0.57(CO
]. Crystal-structure refinement shows disordered carbonate and sulfate groups along the fourfold axis. Silvialite is a primary cumulate phase precipitated from alkali basalt at 900−1000°C and 8−12 kbar under high f
and f
. The name silvialite, currently used in literature to describe the sulfate analogue of meionite, was suggested by Brauns (1914).</description><subject>Australia</subject><subject>electron-microprobe data</subject><subject>meionite</subject><subject>new mineral</subject><subject>Queensland</subject><subject>scapolite</subject><subject>silvialite</subject><subject>sulfate</subject><subject>X-ray data</subject><issn>0026-461X</issn><issn>1471-8022</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNpdUE1LwzAYDqLgnJ695gdYlzcfbXfwMIYfg4HCFLyVtEm2jDYpTerw6M2zP9FfYuc8eXoeeL7gQegSyDVATiaE0JSnMJ0KngueHaER8AySnFB6jEZ7NRnk11N0FsKWEOAg6Ah9rGz9ZmVto77CEju9w6GvjYw6Ub6xTrqIG92UusPe4LjROFSy9Xs_Xne-b_HOxg2WDs_qZGVx5ZvWBxutd0OZ7H4jCz5pvj-_njidONxuZNA4dtIdbOfoxMg66Is_HKOXu9vn-UOyfLxfzGfLJAClkKRMmKqkJZNc5VSnoKYalFGQZyxjitOqzITSRgKpDE-rshTAVQaG05RIIdgY3Rx6d7KOulN63fXvAym2vu_csFwAKfZPFv-eTBljFNgPjwFqHA</recordid><startdate>19990601</startdate><enddate>19990601</enddate><creator>Teertstra, D. K.</creator><creator>Schindler, M.</creator><creator>Sherriff, B. L.</creator><creator>Hawthorne, F. C.</creator><general>De Gruyter</general><scope/></search><sort><creationdate>19990601</creationdate><title>Silvialite, a new sulfate-dominant member of the scapolite group with an Al-Si composition near the I4/m−P42/n phase transition</title><author>Teertstra, D. K. ; Schindler, M. ; Sherriff, B. L. ; Hawthorne, F. C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-s1221-635fcb2b3a4d82e61d9e1dfd187373d42cb75defa10cf46cbb514d71f4260a553</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Australia</topic><topic>electron-microprobe data</topic><topic>meionite</topic><topic>new mineral</topic><topic>Queensland</topic><topic>scapolite</topic><topic>silvialite</topic><topic>sulfate</topic><topic>X-ray data</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Teertstra, D. K.</creatorcontrib><creatorcontrib>Schindler, M.</creatorcontrib><creatorcontrib>Sherriff, B. L.</creatorcontrib><creatorcontrib>Hawthorne, F. C.</creatorcontrib><jtitle>Mineralogical magazine</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Teertstra, D. K.</au><au>Schindler, M.</au><au>Sherriff, B. L.</au><au>Hawthorne, F. C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Silvialite, a new sulfate-dominant member of the scapolite group with an Al-Si composition near the I4/m−P42/n phase transition</atitle><jtitle>Mineralogical magazine</jtitle><date>1999-06-01</date><risdate>1999</risdate><volume>63</volume><issue>3</issue><spage>321</spage><epage>329</epage><pages>321-329</pages><issn>0026-461X</issn><eissn>1471-8022</eissn><abstract>Silvialite, ideally Ca
Al
Si
SO
, is tetragonal, I4/m, Z = 2, with a = 12.160(3), c = 7.560(1) Å, V = 1117.9(8) Å
, c:a = 0.6217:1, ω= 1.583, Ɛ= 1.558 (uniaxial negative), D
= 2.75 g/cm
, D
= 2.769 g/cm
and H (Mohs) = 5.5. It is transparent and slightly yellow, has a good {100} cleavage, chonchoidal fracture, white streak and a vitreous lustre. It occurs in upper-mantle garnet-granulite xenoliths hosted by olivine nephelinite, from McBride Province, North Queensland, Australia. The empirical formula, derived from electron-microprobe analysis, is (Na
Ca
)(Al
Si
)O
[(SO
)0.57(CO
]. Crystal-structure refinement shows disordered carbonate and sulfate groups along the fourfold axis. Silvialite is a primary cumulate phase precipitated from alkali basalt at 900−1000°C and 8−12 kbar under high f
and f
. The name silvialite, currently used in literature to describe the sulfate analogue of meionite, was suggested by Brauns (1914).</abstract><pub>De Gruyter</pub><doi>10.1180/002646199548547</doi><tpages>9</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0026-461X |
| ispartof | Mineralogical magazine, 1999-06, Vol.63 (3), p.321-329 |
| issn | 0026-461X 1471-8022 |
| language | eng |
| recordid | cdi_walterdegruyter_journals_10_1180_002646199548547633321 |
| source | EZB-FREE-00999 freely available EZB journals |
| subjects | Australia electron-microprobe data meionite new mineral Queensland scapolite silvialite sulfate X-ray data |
| title | Silvialite, a new sulfate-dominant member of the scapolite group with an Al-Si composition near the I4/m−P42/n phase transition |
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