Crystal Lattice Structures:	Creation Date: 17 Jul 2008
	Last Modified: 17 Jul 2008

The Matlockite (PbFCl) Structure

You can now

• see the structure from several perspectives;
• examine the structure with an external viewer; or
• download the coordinates of the atoms in these pictures in XYZ format.
• visualize the structure (Uses the JMOL Applet)

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• We use setting 2 of space group 129 for the atomic positions, but the pictures are drawn with F atoms at the corners. The pictures cover two lattice constants in each direction to show the separation of the PbFCl layers.
• The name Matlockite comes from the American Mineralogist Crystal Structure Database. It is not used by Wyckoff.
• Note that this is the AsCuSiZr structure with either the Silicon or Copper atoms removed.

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• Prototype: PbFCl
• Pearson Symbol: tP6
• Strukturbericht Designation: none
• Space Group: P4/nmm (Cartesian and lattice coordinate listings available)
• Number: 129
• Reference: R.W.G. Wyckoff, Crystal Structures, Vol. 1, pp. 295-296.
• Other Compounds with this Structure: AcOBr, AmOCl, BaHCl, BiOBr, BiOI, CaHBr, CeOCl, DyOCl, LaOI, NdOCl, NpOS, PbFBr, PrOCl, SmOI, SrHI, ThOTe, UOS, UTe₂, YbOI, others.
• Primitive Vectors:

  A1	=	a X
  A2	=	a Y
  A3	=	c Z

• Basis Vectors:

  B1	=	- ¼ A1 + ¼ A2	=	- ¼ a X + ¼ a Y	(2a)	(F)
  B2	=	+ ¼ A1 - ¼ A2	=	+ ¼ a X - ¼ a Y	(2a)	(F)
  B3	=	+ ¼ A1 + ¼ A2 + x1 A3	=	+ ¼ a X + ¼ a Y + x1 c Z	(2c)	(Pb)
  B4	=	- ¼ A1 - ¼ A2 - x1 A3	=	- ¼ a X - ¼ a Y - x1 c Z	(2c)	(Pb)
  B5	=	+ ¼ A1 + ¼ A2 + x2 A3	=	+ ¼ a X + ¼ a Y + x2 c Z	(2c)	(Cl)
  B6	=	- ¼ A1 - ¼ A2 - x2 A3	=	- ¼ a X - ¼ a Y - x2 c Z	(2c)	(Cl)

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Structures indexed by: Strukturbericht Symbol Pearson Symbol Space Group Prototype

This is a mirror of an old page created at the Naval Research Laboratory Center for Computational Materials Science The 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).