Germanium has a cubic unit cell with a side edge of 565pm. The density of germanium is 5.36g/cm^3. What is the crystal system adopted by germaium.

  1. 👍
  2. 👎
  3. 👁
  1. Find the mass in grams in one cell.



    mass=1.8E-22 cm^3*5.36g/cm^3= you do it.

    Ok, how many Ge atoms is that?

    Now, given the number of atoms per unit cell, is it face centered, body centered, or simple cubic

    1. 👍
    2. 👎

    1. 👍
    2. 👎
  3. I get 8 atom/unit cell and the answer in my book was face centered. But i am a bit confused don't FCC have 4 atoms/unit cell?

    1. 👍
    2. 👎
  4. Yes, fcc cells have four atoms/unit cell; however, if y ou look at the link provided by Bob Pursley, you will see two things there. First, the statement that Ge is like diamond and the Ge structure is "two interpenetrating face centered unit cells". I was confused, also, when I worked the problem and obtained 8. I IMed Bob P, we discussed it, and he found the link shown above. In fact, we talked about how the student was supposed to know that Ge had the diamond structure and that it was interpenetrating face centered unit cells? We wondered if this was an upper upper class or a grad student problem. Both of us thought the problem was too difficult for lower level classes but of course we aren't teaching the course. I hope this helps explain.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    How is the atomic structure of a Copper differ from Germanium, Silicon and Gallium Arsenide ? Tnx :))

  2. chem

    The crystal structure of lithium sulfide (Li2S) is pictured here. (Intro 1 figure) The edge length of the unit cell is 5.88*10^2^2 pm. i guess it is FCC ( face cenred cubic) 1-- What are the coordination numbers of and Li^+ and

  3. Chem

    Based on the number of atoms per unit cell and the mass of the atom, the mass of the unit cell can be calculated. The density of the unit cell and the material as a whole can be determined from the mass and the volume of the unit

  4. Chemistry

    The density of solid W is 19.3 g/cm3. How many atoms are present per cubic centimeter of W? As a solid, W adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of W? What is the volume of a

  1. AP Chemistry

    Titanium metal has a body-centered cubic unit cell. The density of Titanium is 4.50 g/cm^3. Calculate the edge length of the unit cell and a value for the atomic radius of titanium. Ok, I know how to find the density using the

  2. Chemistry

    Boron Phosphide, BP, is a semiconductor, and a hard, abrasion resistant material. It is made by reacting Boron tribromide and phosphorus tribromide in a hydrogen atmosphere at high temperature (>750 degrees C) (a) Write a Balanced

  3. Chemistry AP HELP!

    Tausonite, a mineral composed of Sr, O, and Ti, has the cubic unit cell and the chemical formula is SrTiO3..... Ti is coordinated by 6 O atoms, because the Ti is located at the center of the unit cell. To see the full coordination

  4. chemistry

    Gallium crystallizes in a primitive cubic unit cell. The length of an edge of this cube is 362 pm. What is the radius of a gallium atom? The face-centered gold crystal has an edge length of 407 pm. Based on the unit cell,

  1. Chemistry

    1.The density of solid Fe is 7.87 g/cm3. What volume per atom of Fe? 2.As a solid Fe adopts a body centered cubic unit cell. What is the volume of a unit cell of this metal? 3.What is the edge length of a unit cell of Fe?

  2. AP Chemistry

    You are given a small bar of an unknown metal X. You find the density of the metal to be 10.5g/cm3. An x-ray diffraction experiment measures the edge of the face-centered cubic unit cell as 4.09 A. (1A=10^-10m) Identify X.

  3. General Chemistry

    PLEASE ANSWER VERY SOON I AM STUCK! Crystalline silicon has a cubic structure. The unit cell edge length is 543 pm. The density of the solid is 2.33 g/cm3. Calculate the number of Si atoms in one unit cell.


    As a solid, Ag adopts a face-centered cubic unit cell. How many unit cells are present per cubic centimeter of Ag?

You can view more similar questions or ask a new question.