Physical Properties of Ore Minerals

Table 1. Cubic Crystal Class

© Charles E. Corry

Minerals are arranged alphabetically by space group (Schoenflies symbol).

If you want to print this table please use landscape mode.
Mineral NameCompositionSpace GroupResistivity (ohm-m)Dielectric PermittivityCharge Separation PhenomenaCurie Temp. °CMagnetic Properties k×10-6cgsOptical PropertiesR %Comments
CobaltiteCoAsST4semiconductor 1.3x10-1 to 6.533<e<81piezoelectric  very weak pleochroism50.5 
Cobaltullmanite(Ni,CO)SbST4  piezoelectric  no data  
Gersdorffite(Ni,Co,Fe)AsST4metal
10-6 to 1
 piezoelectric ferroelectric??700paramagneticsome anomalous anisotropism54.2Also under triclinic point group 1, space group P1
KalliliteNi(Sb,Bi)ST4  piezoelectric  some anisotropy44.5 to 46.1? 
KrutoviteNi1-xAs2T4metal piezoelectric  no data64-67? 
UllmaniteNiSbST4metal
9×10-8 to 9
 piezoelectric  some anisotropy46.4Forms solid solution with corynite.
Willyamite(Co,Ni)SbST4  piezoelectric  isotropic~45 ? 
Bravoite(Ni,Fe,Co)S2Th6  piezoelectric  isotropic30.9 to 52.2Forms solid solution with pyrite, vaesite, and cattierite. Reflectivity (R) varies with composition.
CattieriteCoS2Th6metal
10-6 to 10-4
  120Kferrimagnetic
k = 4,000
isotropic33.4Forms solid solution with pyrite, vaesite, and bravoite.
PyriteFeS2Th6semiconductor
10-5 to 102
10-3 n-type
3x10-2 p-type
10<e<81ferroelectric ??742diamagnetic
paramagnetic
k = 4 to 420
mean 130
bireflectance except on octahedral planes; anisotropic., twinning may be common.51.7 to 52.8Forms solid solution with arsenopyrite, bravoite, cattierite, chalcopyrite, pyrrhotite, and vaesite. Dimorphic with marcasite. Measurable surface charges on crystal faces at 25C.
VaesiteNiS2Th6semiconductor
10-3 to 1
 ferroelectric ??1022antiferromagnetic
k = 700
resembles pyrrhotite30.7 to 31.6Forms solid solution with pyrite, bravoite, and cattierite.
SulvaniteCu3(V,As)S4Td1  piezoelectric  isotropic29.0 to 30.2Complete solid solution between vanadiosulvanite and arsenosulvanite.
ColoradoiteHgTeTd2semiconductor
4×10-6 - 10-4
 piezoelectric  isotropic35.5 to 36.8 
ColusiteCu3(Fe,V,As,Sn,)S4Td2  piezoelectric  strongly zoned29.8Superstructure of sphalerite
HawleyiteCdSTd2semiconductor piezoelectric diamagnetic
k = -50
isotropic~20Dimorphic with greenockite
MetacinnabarHgSTd2semiconductor
10-6 to 10-2
 piezoelectric diamagnetic
k = -55
very weak pleochroism, weak anisotropy, weak bireflectance.25.5Dimorphic with cinnabar
SphaleriteZnSTd2semiconductor
2.7×10-3-1012
7.5<e<69.7piezoelectric1020diamagnetic
k = -25 to -60
isotropic to moderate birefringence as wurtzite structure approached.16.7Dimorphic with wurtzite and matraite.
StilleiteZnSeTd2semiconductor9.1piezoelectric  isotropic to weak anisotropy.~30 
TiemanniteHgSeTd3semimetal25<e<29piezoelectric  isotropic25.5 to 29.2 
EskeborniteCu<1Fe>2Se>2Td3  piezoelectric
ferroelectric ??
 ferrimagneticdistinct pleochroism, strong anisotropy, weak to distinct bireflectanceRo-32.8
Re-29.2
 
GalkhaiteHgAsS2Td3  piezoelectric  deep orange XX'sno data 
TalnakhiteCu9(Fe,Ni)8S16Td3semiconductor piezoelectric antiferromagneticisotropic39.3Forms solid solution with chalcopyrite.
Tennantite(Cu,Fe,Zn,Ag)12·
Sb4S13
Td3semiconductor
7×10-4 to 0.4
 piezoelectric  isotropic, internal reflections common29.6Forms solid solution with tetrahedrite.
Tetrahedrite(Cu,Fe,Zn,Ag)12·
Sb4S13
Td3semiconductor
0.3 to 3×104
 piezoelectric  isotropic, internal reflections uncommon30.5Forms solid solution with tennantite.
Boracite (beta)Mg3B7O13ClTd5insulator
108 to 1010
[110] 8ferroelectric
LeCorre (1957)
265 weak birefringenceOTHigh temperature paraelectric phase. See under orthorhombic as well.
DomeykiteCu3AsTd6  piezoelectric225 isotropic52.1 
GermaniteCu3(Ge,Fe)S4T11  piezoelectric  isotropic20.3 
CupriteCu2OOh4semiconductor
3 to 3×102
7.6  diamagnetic
k = -20
distinct pleochroism, distinct anisotropy, very weak bireflectance.26.6 to 26.7 
AlabanditeMnSOh5semiconductor ferroelectric ? antiferromagnetic
Tn = -121°C
k = 5,600
weakly anisotropic, common internal reflections.22.7Forms solid solution with iron albandite.
AltaitePbTe
Pb1-xSnxTe
Pb1-xGexTe
Oh5semiconductor
10-5 to 10-4
400<e<104ferroelectric
Lines and Glass (1977)
  PbTe is isotropic68.8Ferroelectric in solid solution with Ge or Sn.
ClausthalitePbSeOh5semiconductor280ferroelectric ?  weakly anisotropic.50.9Most common mineral of selenium.
GalenaPbSOh5semiconductor
mixed type
6.8×10-6-17.5
mean 2×10-3
18<e<205ferroelectric ?1127diamagnetic
paramagnetic?
k = -3 to +84
weakly anisotropic43.1 to 43.6Measurable surface charge on fresh crystal faces at 25C.
ManganositeMnOOh5 18ferroelectric ? antiferromagnetic
k = 4,850
abundant internal reflections13.9 to 14.4 
MurdochitePbCu6O8Oh5  ferroelectric ?  isotropic, strongly zoned, common twinning.17.0 
ChromiteFeCr2O4Oh7semiconductor
1 to 5×107
11ferroelectric ?-185ferrimagnetic
k = 240 to 9400
mean 600
may show weak anisotropism, common internal reflections.12.3 
DaubréeliteCr2FeS4Oh7  ferroelectric ?-93ferrimagneticstrong pleochroism, strong anisotropy.15 to 48Reflectivity (R) data from different authors varies radically.
FrankliniteZnFe2O4
(Mn,Zn)Fe2O4
Oh7semiconductor
~105
9ferroelectric ?
 
~260ferrimagnetic
k = 3.6×104
isotropic, some dark red internal reflections.18.5 to 20.0 
Lewisite
(Ti-roméite)
FeCa2Sb2O7Oh7  ferroelectric
Parkhomenko (1971)
  isotropic Roméite has a number of dimorphic forms.
MagnetiteFe3O4Oh7metal
3.1×10-5-10-4
 ferroelectric ?575 to 580ferrimagnetic
k = 105 - 1.6×106
mean 5×105
slight anomalous anisotropism, weak bireflectance.20.0 to 20.1 


Ore Minerals - 29 JAN 1997

Return to Zonge International Home Page