8.26 What is the answer to Ant Manor?

Crystal is a rare mineral, a kind of gem, and a timely crystal, which belongs to the timely family in mineralogy. The main chemical composition is silicon dioxide, and the chemical formula is SiO2.

When pure, colorless and transparent crystals are formed. When containing trace elements such as aluminum and iron, it is pink, purple, yellow and brown.

After irradiation, trace elements form different types of color centers and produce different colors, such as purple, yellow, brown and pink. Minerals containing associated inclusions are called inclusion crystals, such as hair crystal, green ghost, red rabbit hair and so on. Inclusions include rutile, tourmaline, actinolite, mica and chlorite.

Chinese vocabulary

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Transparent timing is a precious mineral, which can be used to make optical instruments, radio equipment and decorations.

example sentence

1, a better crystal form. Composition is silica, colorless and transparent, which can be used to make glasses, seals and transparent mirrors, and colored ones can be used for decoration.

According to "A Mirror of Tongzhi in the Second Year of Gao Zufu in the Late Jin Dynasty": "The main part of Fujian is Wei Zi Palace, decorated with crystals."

Song Fanzhen's Supplement to Dongzhai Notes: "Liu Sui's belt system is a chief judge in Chengdu, strict and knowledgeable, and people call it' crystal lamp'."

According to the ancient and modern novel "Li Gongzi's Satisfaction in Saving Snakes": "The utensils are all made of glass, crystal, amber and agate, which are ingenious and not owned by the world."

According to the preface: "meditate on the shape of flower dew and love the quality of crystal."

2, refers to the crystal clear object.

According to Bai Xuege, Volume I of The Whole Tang Poetry in 785: "Birds peck at the jade mirror in the ice pond, and the wind knocks on the eaves to slide the crystal."

Wei's poem "Night Banquet in the Western Suburb" reads: "Cold and cold contain ice brains, and cherries fall into crystals."

3. Yu "Bright Moonlight"

Hong Sheng's Song of the Immortal Palace in the Qing Dynasty: "The cold toad has just risen to the high shelf, and the curtain rolls to smell the wind and reflect the crystal."

The words in Chen Weisong's "The Heritage Atlas of Bodhisattva Man Titing Qingxi" in the Qing Dynasty: "I still remember to hide and seek, and the crystal courtyard is cool."

optical characteristics

Color: colorless, light to dark purple, light yellow, medium to dark yellow, light to dark brown, brown, green to yellowish green, light to medium pink.

Amethyst: light purple to deep purple.

Topaz: light yellow, medium to dark yellow.

Blue crystal: light blue, dark blue. Almost all blue crystals are synthetic.

Smoke crystal: light to dark brown, brown. When Al3+ in the composition replaces Si4+, [AlO4]4- color center is generated after irradiation.

Green crystal: green to yellowish green. The formation of color is related to Fe2+, and there are almost no natural green crystals on the market, which are usually the intermediate products formed during the heating of amethyst to topaz.

Hibiscus stone: light to medium pink, light tone. It is usually pink because it contains a small amount of titanium (Ti). May have a transmitted starlight effect.

Hair crystal: colorless, light yellow, light brown, etc. However, because rutile is often golden yellow, brownish red and other colors, tourmaline is often grayish black; Contains actinolite, grayish green.