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Santanaite

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Formula:
Pb11(CrO4)O12
Colour:
Straw-yellow
Lustre:
Adamantine
Hardness:
4
Specific Gravity:
9.155 (Calculated)
Crystal System:
Hexagonal
Name:
Named after its discovery locality.
Needs restudy.


Hide all sections | Show all sections

Classification of SantanaiteHide

Approved
Approval Year:
1971
7.FB.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
F : Chromates
B : With additional O,V, S, Cl
Dana 7th ed.:
35.4.1.1
35.4.1.1

35 : ANHYDROUS CHROMATES
4 : Miscellaneous
27.2.7

27 : Sulphites, Chromates, Molybdates and Tungstates
2 : Chromates

Physical Properties of SantanaiteHide

Adamantine
Colour:
Straw-yellow
Hardness:
Density:
9.155 g/cm3 (Calculated)

Optical Data of SantanaiteHide

Type:
Uniaxial (-)
RI values:
nω = 2.320 nε = 2.120
Max Birefringence:
δ = 0.200
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of SantanaiteHide

Formula:
Pb11(CrO4)O12
IMA Formula:
Pb11CrO16

Crystallography of SantanaiteHide

Crystal System:
Hexagonal
Class (H-M):
6 2 2 - Trapezohedral
Space Group:
P63 2 2
Cell Parameters:
a = 9.03 Å, c = 39.84 Å
Ratio:
a:c = 1 : 4.412
Unit Cell V:
2,813.36 ų (Calculated from Unit Cell)
Z:
6

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.539 (100)
2.948 (40)
2.606 (80)
2.243 (40)
2.100 (40)
2.080 (50)
1.701 (50)

Type Occurrence of SantanaiteHide

Other Language Names for SantanaiteHide

German:Santanait
Spanish:Santanaita

Related Minerals - Nickel-Strunz GroupingHide

7.FB.05PhoenicochroitePb2(CrO4)OMon.
7.FB.15Wattersite(Hg+2)2Hg2+(CrO4)O2Mon. 2/m : B2/b
7.FB.20Deanesmithite(Hg+2)Hg2+3(CrO4)S2OTric.
7.FB.25EdoyleriteHg2+3(CrO4)S2Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

27.2.1TarapacáiteK2(CrO4)Orth. mmm (2/m 2/m 2/m)
27.2.2LópeziteK2Cr2O7Tric. 1 : P1
27.2.3ChromatiteCaCr6+O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
27.2.4HashemiteBa(CrO4)Orth. mmm (2/m 2/m 2/m) : Pnma
27.2.5CrocoitePbCrO4Mon. 2/m : P21/b
27.2.6PhoenicochroitePb2(CrO4)OMon.
27.2.8IranitePb10Cu(CrO4)6(SiO4)2(OH)2Tric.
27.2.9HemihedritePb10Zn(CrO4)6(SiO4)2(OH)2Tric.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for SantanaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
NJMM (1972): 455 [Am.Min.(1973): 58: 966 (abstract]

Internet Links for SantanaiteHide

Localities for SantanaiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Chile (TL)
 
  • Antofagasta Region
    • Antofagasta Province
      • Sierra Gorda District
        • Caracoles
NJMM (1972), 455; HB3 (1997)
Mineral and/or Locality  
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