Journal ArticleDOI
Preparation of Synthetic Quartz
Nora Wooster,W. A. Wooster +1 more
TLDR
In this article, the authors have repeated Spezia's experiments so far as to confirm his results, but the period of months which is required for appreciable growth to occur makes the method unsuitable for industrial production.Abstract:
THE extensive use of quartz in piezoelectric oscillators has stimulated the production of synthetic quartz crystals Spezia1 in 1906 grew quartz at a temperature somewhat below 300° C from an aqueous solution containing sodium metasilicate and sodium chloride His method was to dissolve quartz in the hotter part of the container and deposit it in the cooler part We have repeated Spezia's experiments so far as to confirm his results, but the period of months which is required for appreciable growth to occur makes the method unsuitable for industrial productionread more
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Journal ArticleDOI
Hydrothermal Synthesis of Quartz Crystals
TL;DR: In this article, it was shown that the appearance of electrical twinning on the growing faces of the quartz crystals can be caused by corrosion of steel in alkaline solution, which was a rather unexpected problem, since in high-pressure steam boilers alkali is added in small amounts to prevent corrosion of the boiler tubes.
Journal ArticleDOI
Rapid growth of mineral deposits at artificial seafloor hydrothermal vents
Tatsuo Nozaki,Tatsuo Nozaki,Jun-ichiro Ishibashi,Kazuhiko Shimada,Toshiro Nagase,Yutaro Takaya,Yutaro Takaya,Yasuhiro Kato,Yasuhiro Kato,Shinsuke Kawagucci,Tomo-o Watsuji,Takazo Shibuya,Ryoichi Yamada,Tomokazu Saruhashi,Masanori Kyo,Ken Takai +15 more
TL;DR: Petrological and geochemical properties of sulphide chimneys less than 2 years old that formed where scientific boreholes vented hydrothermal fluids in the Iheya-North field, Okinawa Trough, in East China Sea are reported, suggesting the possibility of cultivating seafloor sulphide deposits and even controlling their growth and grades through manipulations of how to mix and quench hydroThermal fluids with the ambient seawater.
Journal ArticleDOI
Solvothermal and hydrothermal processes: the main physico-chemical factors involved and new trends
TL;DR: In this paper, the authors present a brief history of their development, an analysis of the key factors governing such processes, and the recent trends in the development of nanocrystallites.
Journal ArticleDOI
Conversion of serpentine to smectite under hydrothermal condition: Implication for solid-state transformation
Shichao Ji,Jianxi Zhu,Hongping He,Qi Tao,Runliang Zhu,Lingya Ma,Meng Chen,Shangying Li,Junming Zhou +8 more
TL;DR: In this paper, the authors investigated the possibility of the transformation from serpentine to smectite, the effect of precursor minerals' structure on the transformation and the transformation mechanism involved.