Silica

(noun.) a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite.

迪莉娅编辑

• Silica is also met with in the carnelian and we find it constituting jasper, agate, cat’s-eye, onyx and opals. 佚名. 神奇的知识之书.
• Rub the fossil silica to a fine powder and thoroughly mix with the chalk. 威廉K.戴维. 智者、化学家和伟大医生的秘密.
• Prepared chalk or whiting can be used instead of fossil silica. 威廉K.戴维. 智者、化学家和伟大医生的秘密.
• They are found in volcanic regions and are supposed to be due to the action of hot water, which carried off the organic material and deposited dissolved silica in its place. 佚名. 神奇的知识之书.
• Many natural waters present us with silica in a dissolved state, although it is not soluble in pure water. 佚名. 神奇的知识之书.
• There were many things which went through the system without injury; for instance, silica, of which most people took a great deal in the twenty-four hours. 威廉K.戴维. 智者、化学家和伟大医生的秘密.
• The silica, which is the principal ingredient of sand, as well as of nearly all the earthy minerals, is known as rock crystal in its naturally crystallized form. 佚名. 神奇的知识之书.
• The following is the record of the results: RESULTS OF WORKING BRIQUETTES AT THE CRANE FURNACE Quantity of Phos- ManDate Briquette Tons Silica phorus Sulphur ganese Working Per Cent. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• He discovered silica in the epidermis of the stems of weeds, corn, and grasses. 鲁伯特·萨金特·荷兰. 历史性发明.
• The resistance offered by silica to all impressions is exemplified in the case of flint which consists essentially of silica colored with some impurity. 佚名. 神奇的知识之书.

整理:塞尔瓦托