1 / 11

Solid State

Solid State. Solids. Solids can be classified as crystalline solids (highly regular arrangement of atoms or ions or molecules) represented by a lattice. Unit cell = smallest repeating unit of a lattice Cubic, body centered, face centered or as amorphous solids (structural disorder) like glass.

callia
Download Presentation

Solid State

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Solid State

  2. Solids • Solids can be classified as crystalline solids (highly regular arrangement of atoms or ions or molecules) represented by a lattice. • Unit cell = smallest repeating unit of a lattice • Cubic, body centered, face centered • or as amorphous solids (structural disorder) like glass

  3. Cubic, Body-Centered Cubic, Face-Centered Cubic

  4. Morton Salt (p 29) • A chemical (CaSiO3) called a desiccant is added to table salt (NaCl) to prevent water absorption and caking. • CaSiO3 + H2O 3CaO∙2SiO2 ∙3H2O ≡ hydrate • Here is another example: CoCl2 (cobalt chloride anhydrous, blue); CoCl2∙2H2O (cobalt chloride dihydrate, purple); Co(H2O)6)Cl2 (hexaaquacobalt(II) chloride, pink)

  5. Desiccants (p 30) • Desiccants or drying agents act as a sink for water (hygroscopic) to protect the integrity of a product (salt, electronics, shoes, ). • Desiccant efficiency is measured by mass of water stored per mass of desiccant. • When added to food, they must be chemically stable, non toxic and able to absorb a lot of water per unit weight of desiccant

  6. Hope Diamond (p 32, photo by Chip Clark)

  7. Diamond • Diamond is a form of elemental carbon, produced under high P and T. • Exceptional hardness (e.g. diamond drill; hardest natural mineral), lustre (e.g. jewelry), clarity. • Diamond does not conduct electricity.

  8. Diamond has 2 interpenetrating fcc lattices. • Isometric hexoctahedral crystal.

  9. Diamond Color • Diamonds made of pure carbon are transparent, but if there are impurities, i.e. other atoms substitute for C or structural defects the diamond becomes colored.

  10. Another form of Carbon • Graphite (Greek for to write or draw) is another form of carbon and is used as pencil “lead”. • It is the most stable form of C at room T and P. • Graphite conducts electricity.

  11. Graphite • Hexagonal arrangement of C atoms form layers that give graphite its lubricating property.

More Related