IYC2011 - Silicon Traditional Geocache

This cache has been archived.

cervisvenator: Hi

While I feel that Geocaching.com should hold the location for the cache owner and block other cachers from placing a cache in the area around this cache for a reasonable amount of time, we can’t do so forever.

Nothing seems to happen with this cache listing, so it is now archived, so that someone else can place a cache in the area, and geocachers can once again enjoy visiting this location. Also, if it hasn’t been done already, please pick up any remaining cache bits as soon as possible.

If the owner wants it reopened, send me an e-mail and I’ll be happy to unarchive the cache listing if it still satisfies the requirement/guidelines.

(This reviewer note is in English so non-Norwegian cache owners, geocachers and cache reviewers can understand what it says.)

Thanks for your understanding,
Cervis Venator
Geocaching.com Volunteer Cache Reviewer

More
Hidden : 4/8/2010
Difficulty:
1.5 out of 5
Terrain:
2 out of 5

Size: Size: micro (micro)

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Geocache Description:

This is a cache in the IYC2011-series that is preparing for the
International Year of Chemistry in 2011. They will hopefully
increase chemistry knowledge as well as provide for good cache
experiences.

Each cache in the IYC2011-series contains a clue (on the log
sheet) to find the final IYC2011-cache to be released on
1/1/2011.

Silicon



Silicon is the chemical element with atomic number 14, represented by the symbol Si.
A tetravalent metalloid, silicon is less reactive than its chemical analog carbon. As the eighth most common element in the universe by mass, silicon very rarely occurs as the pure free element in nature, but is more widely distributed in dusts, planetoids and planets as various forms of silicon dioxide, SiO2 (silica) or silicates. In Earth's crust, silicon is the second most abundant element after oxygen, making up 25.7% of the crust by mass.



Silicon has many industrial uses. It is the principal component of most semiconductor devices, most importantly integrated circuits or microchips. Silicon is widely used in semiconductors because it remains a semiconductor at higher temperatures than the semiconductor germanium and because its native oxide is easily grown in a furnace and forms a better semiconductor/dielectric interface than any other material.



In the form of silica and silicates, silicon forms useful glasses, cements, and ceramics. It is also a constituent of silicones, a class-name for various synthetic plastic substances made of silicon, oxygen, carbon and hydrogen, often confused with silicon itself.



Today, silicon is purified by converting it to a silicon compound that can be more easily purified by distillation than in its original state, and then converting that silicon compound back into pure silicon. Trichlorosilane is the silicon compound most commonly used as the intermediate, although silicon tetrachloride and silane are also used. When these gases are blown over silicon at high temperature, they decompose to high-purity silicon.
In the Siemens process, high-purity silicon rods are exposed to trichlorosilane at 1150 °C. The trichlorosilane gas decomposes and deposits additional silicon onto the rods, enlarging them:

2 HSiCl3 → Si + 2 HCl + SiCl4

Silicon produced from this and similar processes is called polycrystalline silicon. Polycrystalline silicon typically has impurity levels of less than 10-9.
In 2006 REC announced construction of a plant based on fluidized bed technology using silane:

3 SiCl4 + Si + 2 H2 → 4 HSiCl3
4 HSiCl3 → 3 SiCl4 + SiH4
SiH4 → Si + 2 H2

Read more about Silicon here or here.

Cache contents


- Logsheet
- Pencil
- FTF-certificate

Additional Hints (Decrypt)

CRG-yvat ol/haqre srapr cbyr.

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)


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