Like bcc but central ion (Cs+) different to vertexes (Cl-). P as no interstitial sites. CoNos = 8.
2 of 8
Fluorite structure (CaF2)
Ca2+ = ccp. F- in tet. holes. N atoms in ccp -> 2N tet. holes. CoNos- Ca2+ = 8. F- = 4
3 of 8
Nickel-arsenide structure
hcp. CoNos- Ni = 6 (octahedral). As = 6 (trigonal prisamic) (hcp version of rock-salt)
4 of 8
The sphalerite (zinc blende) structure
ccp of S2- ions. Zn2+ in 1/2 tet. holes. CoNo = 4 (diamond has this)
5 of 8
The wurtzite structure
hcp version on sphalerite
6 of 8
Rutile structure
e.g. TiO2. Unit cell not cubic (1 length longer than other 2). CoNos- Ti = 6, O = 3 (use as self cleaning glass coating)
7 of 8
Perovskite
CaTiO3 (AMO3). A2+/M4+ or A3+/M3+. ccp of Ca2+ and O2-. Ti4+ in 1/4 oct. holes. Ca2+ at centre, Ti4+ at 8 corners, O2- at 12 edges. CoNos- Ti=6, Ca=12, O=6
8 of 8
Other cards in this set
Card 2
Front
Like bcc but central ion (Cs+) different to vertexes (Cl-). P as no interstitial sites. CoNos = 8.
Back
Cesium-chloride structure
Card 3
Front
Ca2+ = ccp. F- in tet. holes. N atoms in ccp -> 2N tet. holes. CoNos- Ca2+ = 8. F- = 4
Back
Card 4
Front
hcp. CoNos- Ni = 6 (octahedral). As = 6 (trigonal prisamic) (hcp version of rock-salt)
Back
Card 5
Front
ccp of S2- ions. Zn2+ in 1/2 tet. holes. CoNo = 4 (diamond has this)
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