List of specified cards with unique numbers under unique name
WILLEMITE
NN
Card
Specie
Formula
Space Group
1.
5217
[1], t-phenakite
Zn
2
SiO
4
R 3(-)
2.
5218
[2], t-phenakite, syn
Zn
2
[SiO
4
]
*R 3(-)
3.
5220
[4], t-phenakite
Zn
2
SiO
4
R 3(-)
4.
5221
[5], at high psessure
Zn
2
SiO
4
I 4(-)2d