...Xia Wang; Guang Hai Shi; Deng Feng Qiu; Jing Wang; Wen Yuan Cui Abstract A new rock type in the Hpakant jadeitite area, Myanmar is identified as jadeitized rodingite. The rock consists of omphacite, garnet and jadeite, with minor allanite-(La), phlogopite, zeolite, chlorite, and a barian mineral...

...T. Hlabse; O. J. Kleppa Abstract The enthalpy changes associated with the mineralogical reactions (1) Albite = Jadeite+Quartz (2) Albite+Nepheline = 2 Jadeite have been redetermined at 964°K by oxide melt solution calorimetry. For (1) we find ΔH° 964 = +0.27 ± 0.50 kcal/mole; for (2) ΔH° 964...

...F. Nestola; M. Tribaudino; T. Boffa Ballaran; C. Liebske; M. Bruno Abstract The crystal-structures of seven synthetic pyroxenes along the jadeite–hedenbergite (Jd 57 Hd 43 , Jd 26 Hd 74 , Jd 0 Hd 100 ) and jadeite–aegirine (Jd 100 Ae 0 , Jd 76 Ae 24 , Jd 35 Ae 65 , Jd 0 Ae 100 ) joins were refined...

...Wen Su; Kai Ye; Jingbo Liu Abstract Deformed jadeite grains in the UHP jadeite-quartzites from the Dabie Mountains, eastern China show evidence (by transmission electron microscopy, TEM) of plastic deformation: free dislocations, dislocation loops, dislocation networks, dislocation arrays...

...Joanna A. BARTKOWSKA; Jan CISOWSKI; Jean VOIRON; Jan HEIMANN; Maria CZAJA; Zbigniew MAZURAK Abstract We have studied the high-field magnetization (up to 14.5 T) and magnetic susceptibility in the temperature range 1.7 - 420 K of two samples of jadeite (NaAlSi 2 O 6 ), white and green, containing...

...T. W BLOXAM Abstract The origin of jadeite-bearing metagray-wackes from the Franciscan Formation of California and their relationships to the blue amphibole-rich “blueschists” are discussed. Owing to their unfavorable chemical composition the regionally prevalent graywackes seldom develop...

...T. W. Bloxam Abstract At several localities in California jadeite-bearing rocks have developed from the metamorphism of Franciscan graywackes. In the field the jadeite-bearing rocks are almost indistinguishable from somewhat sheared graywackes. Preservation of clastic structures and relict minerals...

...Tatsuki Tsujimori; Juhn G. Liou; Robert G. Coleman Abstract Coexisting jadeite and omphacite were found as retrograde minerals in a jadeite-bearing lawsonite-eclogite from the Motagua Fault Zone, Guatemala. The lawsonite-eclogite is characterized by the occurrence of garnet porphyroblasts up to 2.5...

...F. Nestola; T. Boffa Ballaran; C. Liebske; R. Thompson; R .T. Downs Abstract Four synthetic crystals belonging to the jadeite (Jd, NaAlSi 2 O 6 )-hedenbergite (Hd, CaFeSi 2 O 6 ) solid solution were investigated by X-ray diffraction in situ at high pressure using a diamond anvil cell to P max...

...Hans-Peter Schertl; Walter V. Maresch; Klaus P. Stanek; Andreas Hertwig; Martin Krebs; Rauno Baese; Sergey S. Sergeev Abstract New occurrences of jadeitite and jadeite-rich rocks have been discovered in the Rio San Juan Complex (RSJC) of the northern Dominican Republic in serpentinite mélanges...

...Walter V. Maresch; Christiane Grevel; Klaus Peter Stanek; Hans-Peter Schertl; Michael A. Carpenter Abstract Samples of rocks reported in the literature to be jadeite jade from the subduction-zone complex of the Escambray Massif in central Cuba have been studied by optical and transmission electron...

...R. K. Popp; M. C. Gilbert Abstract Hydrothermal experiments in the system NaFeSi 2 O 3 (acmite + quartz)-NaAlSi 3 O 8 (albite, or jadeite + quartz) have defined the curve separating the stability fields of clinopyroxene + quartz from clinopyroxene + albite + quartz. At 600°C and 4 kbar...

...Alexander McBirney; Ken-ichiro Aoki; Manuel N. Bass Abstract Jadeite occurs as inclusions in serpentinite in the Motagua fault zone. A boulder of remarkable size and purity was found near Manzanal, Guatemala, and chemical, optical, and X-ray studies have been made of a separated sample...

...C. T. Prewitt; Charles W. Burnham Abstract The crystal structure of naturally occurring pure jadeite has been refined by least-squares methods using single-crystal x -ray intensity data obtained by counter-diffractometer techniques. This jadeite is monoclinic, space group C2/c , with cell...

...C. W. Wolfe Abstract Good crystals of jadeite, a few doubly terminated, have been discovered by Dr. John Peoples of Petaluma, California, along the Russian River near Cloverdale, California. Optical data: α = 1.640, β = 1.645, γ = 1.652, all ± 0.003; biaxial positive; 2V = 67°; elongation positive...

...G. H. Shi; B. Stöckhert; W. Y. Cui Abstract Four distinct textures and related compositions of kosmochlor (Ko) and chromian jadeite in rocks from the Myanmar jadeitite area are described: (1) spheroidal or ellipsoidal aggregates with a corona texture surrounding relict chromite; (2) spheroidal...

...Martin Radvanec; Shohei Banno; W. G. Ernst Abstract The chemical microstructure of five jadeitic pyroxenes from three Franciscan quartzose metagraywacke samples was investigated by backscattered electron imagery, element mapping, and electron microprobe microanalysis. These clinopyroxenes...

...Aral I. Okay Abstract Blueschist-facies rocks with jadeite-K-feldspar-lawsonite paragenesis occur as exotic blocks in Miocene debris flows in the blueschist belt of northwest Turkey. The jadeite-K-feldspar rocks have a very fine grain size and although recrystallized locally retain a relict...

...S. K. Sharma; D. Virgo; B. O. Mysen Abstract The coordination of Al 3+ in glasses of jadeite composition, synthesized at 1450° and 1550°C and over the pressure range 0.001-40 kbar, has been determined using laser Raman spectroscopy. The Raman spectrum of glass of jadeite composition at 1 atm...

...Ioannis Baziotis; Stamatios Xydous; Angeliki Papoutsa; Jinping Hu; Chi Ma; Stephan Klemme; Jasper Berndt; Ludovic Ferrière; Razvan Caracas; Paul D. Asimow Abstract Jadeite is frequently reported in shocked meteorites, displaying a variety of textures and grain sizes that suggest formation by either...