Crystal Lattice Structures: Creation Date:  5 Apr 2000 Last Modified:  6 May 2008

# The β (high) Quartz Structure (C8)

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• This is the high-temperature phase of α quartz.
• Over the years, many people have told us that the coordinates and pictures drawn here were wrong. This turned out to be correct. We believe that the current setup is correct, and apologize for any confusion.
• The data here was taken a T = 848 K.

• Prototype: βSiO2
• Pearson Symbol: hP9
• Strukturbericht Designation: C8
• Space Group: P6222 (Cartesian and lattice coordinate listings available)
• Number: 180
• Reference: K. Khira, European Journal of Mineralogy, 2, 63-77 (1990), as referenced in the American Mineralogist Crystal Structure Database.
• Primitive Vectors:  A1 = ½ a X - ½ 3½ a Y A2 = ½ a X + ½ 3½ a Y A3 = c Z
• Basis Vectors:  B1 = ½ A1 = ¼ a X - ¼ 3½ a Y (Si) (3c) B2 = ½ A2 + 2/3 A3 = ¼ a X + ¼ 3½ a Y + 2/3 c Z (Si) (3c) B3 = ½ A1 + ½ A2 + 1/3 A3 = ½ a X + 1/3 c Z (Si) (3c) B4 = + x A1 + 2 x A2 + ½ A3 = + 3/2 x a X + ½ 3½ x a Y + ½ c Z (O) (6j) B5 = - 2 x A1 - x A2 + 1/6 A3 = - 3/2 x a X + ½ 3½ x a Y + 1/6 c Z (O) (6j) B6 = + x A1 - x A2 + 5/6 A3 = - 3½ x a Y + 5/6 c Z (O) (6j) B7 = - x A1 - 2 x A2 + ½ A3 = - 3/2 x a X - ½ 3½ x a Y + ½ c Z (O) (6j) B8 = + 2 x A1 + x A2 + 1/6 A3 = + 3/2 x a X + ½ 3½ x a Y + 1/6 c Z (O) (6j) B9 = - x A1 + x A2 + 5/6 A3 = + 3½ x a Y + 5/6 c Z (O) (6j)

### See the vectors in LaTeX output format.

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 Structures indexed by: This is a mirror of an old page created at theNaval Research LaboratoryCenter for Computational Materials ScienceThe maintained successor is hosted at http://www.aflowlib.org/CrystalDatabase/ and published as M. Mehl et al., Comput. Mater. Sci. 136 (Supp.), S1-S828 (2017).