AuBe not P2(1)3?

[Uncle Al]

  Does anybody have any input on

GP Chatterjee J. Mines Metals Fuels (India) 10 20-25 (1962) 

  saying AuBe is tetragonal rather than the 

Prototype: FeSi
Pearson Symbol: cP8
Strukturbericht Designation: B20
Space Group: P2(1)3 (#198)
a,b,c = 4.668 A
V = 101.7 A^3
Z = 2
d = 13.45 g/cm^3

  structure found by 

B Cullity Trans. Am. Inst. Min. Metall. Pet. Eng. 171 396 (1947)
BT Matthias J. Phys. Chem. Solids 10 342-343 (1959) 
 Atomic Energy Review (Special Issue #4), O. Kubaschewshi, Ed.,
(International Atomic Energy Agency, Vienna, 1973), pp. 47, 78-79

  Any data on neutron diffraction to locate the beryllium atoms is
also interesting.
  (Please post rather than e-mail.)

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Uncle Al
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