Cobalt germanide

Cobalt germanide (CoGe) is an <a href="/facts/Intermetallic_compound/nnzksayl">intermetallic compound</a>, a <a href="/facts/Germanide/pt5Hz0wa">germanide</a> of <a href="/facts/Cobalt/gqhScEw4">cobalt</a>. 
Cubic CoGe crystals (<a href="/facts/Space_group/2XQx0J7M">space group</a> P213, <a href="/facts/Pearson_symbol/K3qljnNu">cP8</a>, a = 0.4631 nm) can be produced by processing a mixture of Co and Ge powders at a pressure of 4 GPa and a temperature of 800–1000 °C for 1 to 3 hours. They have no <a href="/facts/Inversion_center/UzswAm8N">inversion center</a>, and are therefore helical, with right-hand and left-handed <a href="/facts/Chirality/hjx0eGrB">chiralities</a>. The cubic CoGe is <a href="/facts/Metastable/H72SMWof">metastable</a>, and converts into a <a href="/facts/Monoclinic/5PCwXvzX">monoclinic</a> phase upon subsequent heating to 600 °C at ambient pressure. 
Cubic CoGe is an <a href="/facts/Antiferromagnet/aQ124Kh7">antiferromagnet</a> with a transition temperature Tc of 132 K.

Cobalt germanide open-in-new

Cobalt germanide