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Spiroffite

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About SpiroffiteHide

Formula:
Mn2+2Te4+3O8
Colour:
Purplish red to pink
Lustre:
Adamantine
Hardness:
Specific Gravity:
5.01
Crystal System:
Monoclinic
Name:
Named after Kiril Spiroff (1901-1981), mineralogist, Michigan college of Mining and Technology, Houghton, Michigan (USA).
This page provides mineralogical data about Spiroffite.


Classification of SpiroffiteHide

Approved
4.JK.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
K : Tellurites without additional anions, without H2O
34.5.1.1

34 : SELENITES, TELLURITES AND SULFITES
5 : A(X3O8)
28.3.11

28 : Selenites, Selenates, Tellurites, and Tellurates
3 : Tellurites

Physical Properties of SpiroffiteHide

Adamantine
Transparency:
Transparent, Translucent
Colour:
Purplish red to pink
Streak:
White
Hardness:
3½ on Mohs scale
Cleavage:
Imperfect/Fair
Noted in two directions.
Fracture:
Conchoidal
Density:
5.01(2) g/cm3 (Measured)    5.059 g/cm3 (Calculated)

Optical Data of SpiroffiteHide

Type:
Biaxial (+)
RI values:
nα = 1.850(1) nβ = 1.910(1) nγ = 2.200
2V:
Measured: 55°
Max Birefringence:
δ = 0.350
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v distinct

Chemical Properties of SpiroffiteHide

Formula:
Mn2+2Te4+3O8

Crystallography of SpiroffiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 12.87(2) Å, b = 5.3813(5) Å, c = 11.888(2) Å
β = 98.22(1)°
Ratio:
a:b:c = 2.392 : 1 : 2.209
Unit Cell V:
814.87 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Anhedral crystals to 1cm.

Type Occurrence of SpiroffiteHide

Place of Conservation of Type Material:
Harvard University, Boston Massachusetts 108109

Other Language Names for SpiroffiteHide

German:Spiroffit
Simplified Chinese:碲锰锌石
Spanish:Spiroffita
Traditional Chinese:碲錳鋅石

Relationship of Spiroffite to other SpeciesHide

Other Members of this group:
ZincospiroffiteZn2Te4+3O8Mon. 2/m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Tellurite11 photos of Spiroffite associated with Tellurite on mindat.org.
Quartz3 photos of Spiroffite associated with Quartz on mindat.org.
Calcite2 photos of Spiroffite associated with Calcite on mindat.org.
Tellurium2 photos of Spiroffite associated with Tellurium on mindat.org.
Paratellurite1 photo of Spiroffite associated with Paratellurite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.JK.05WinstanleyiteTiTe4+3O8Iso. m3 (2/m 3) : Ia3
4.JK.05Walfordite(Fe3+,Te6+)Te4+3O8Iso. m3 (2/m 3) : Ia3
4.JK.10ZincospiroffiteZn2Te4+3O8Mon. 2/m
4.JK.15BalyakiniteCu(TeO3)Orth.
4.JK.20RajiteCu(Te4+2O5)Mon. 2/m : P21/b
4.JK.25CarlfriesiteCaTe4+2Te6+O8Mon. 2/m : B2/b
4.JK.30Denningite(Mn2+,Ca,Zn)Te4+2O5Tet.
4.JK.35ChekhovichiteBi2Te4+4O11Mon. 2/m
4.JK.40SmirniteBi2Te4+O5Orth. mm2
4.JK.45Choloalite(Cu,Sb)3(Pb,Ca)3(TeO3)6Cl
4.JK.50FairbankitePb(TeO3)Tric.
4.JK.55PlumbotelluritePb(TeO3)Orth.
4.JK.60Magnolite(Hg+2)(Te4+O3)Orth. mm2
4.JK.65MoctezumitePb(UO2)(TeO3)2Mon.
4.JK.70Schmitterite(UO2)(TeO3)Orth.
4.JK.75Cliffordite(UO2)Te4+3O7Iso. m3 (2/m 3) : Pa3

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

28.3.1BalyakiniteCu(TeO3)Orth.
28.3.2RajiteCu(Te4+2O5)Mon. 2/m : P21/b
28.3.3GraemiteCu[TeO3] · H2OOrth. mmm (2/m 2/m 2/m) : Pmma
28.3.4TeineiteCu2+(Te4+O3) · 2H2OOrth. mmm (2/m 2/m 2/m)
28.3.5CesbroniteCu2+3Te6+O4(OH)4Orth.
28.3.6MroseiteCaTe4+(CO3)O2Orth. mmm (2/m 2/m 2/m) : Pbca
28.3.7QuetzalcoatliteZn6Cu3(TeO6)2(OH)6 · AgxPbyClx+2yTrig. 3m (3 2/m) : P3m1
28.3.8ZemanniteMg0.5ZnFe3+(Te4+O3)3 · 4.5H2OHex. 6/m : P63/m
28.3.9KinichiliteMg0.5Mn2+Fe3+(Te4+O3)3 · 4.5H2OHex. 6/m : P63/m
28.3.10Denningite(Mn2+,Ca,Zn)Te4+2O5Tet.
28.3.12WinstanleyiteTiTe4+3O8Iso. m3 (2/m 3) : Ia3
28.3.13FairbankitePb(TeO3)Tric.
28.3.14PlumbotelluritePb(TeO3)Orth.
28.3.15Choloalite(Cu,Sb)3(Pb,Ca)3(TeO3)6Cl
28.3.16SmirniteBi2Te4+O5Orth. mm2
28.3.17ChekhovichiteBi2Te4+4O11Mon. 2/m
28.3.18Cliffordite(UO2)Te4+3O7Iso. m3 (2/m 3) : Pa3
28.3.19Schmitterite(UO2)(TeO3)Orth.
28.3.20MoctezumitePb(UO2)(TeO3)2Mon.
28.3.21EmmonsiteFe3+2(TeO3)3 · 2H2OTric. 1 : P1
28.3.22BlakeiteFe3+2[TeO3]3 (?)
28.3.23MackayiteFe3+(Te4+2O5)(OH)Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
28.3.24PoughiteFe3+2(TeO3)2(SO4)(H2O)2 · H2OOrth.
28.3.25SonoraiteFe3+(TeO3)(OH) · H2OMon.
28.3.26RodalquilariteFe2(TeO2OH)3(TeO3)ClTric. 1 : P1
28.3.27EztlitePb2+2Fe3+3(Te4+ O3)3(SO4)O2ClMon.
28.3.28KeystoneiteMg0.5Ni2+Fe3+(Te4+O3)3 · 4.5H2OHex.

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 SpiroffiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1962): 47: 196.
American Mineralogist (1964): 49: 444.
Canadian Mineralogist (1996): 34: 21-826.
Mineralogical Society of America, Special Paper: 1.

Internet Links for SpiroffiteHide

Localities for SpiroffiteHide

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.
Japan
 
  • Honshu Island
    • Chubu Region
      • Shizuoka Prefecture
        • Shimoda City
          • Rendaiji
Sakurai & Kato (1965) Kobutsugaku Zasshi (Journal of the Mineralogical Society of Japan) 7, 348-350; Rocks & Min.: 62:167
Mexico
 
  • Sonora
    • Mun. de Moctezuma
      • Moctezuma
Collected by Joe Ruiz and analyzed by XRD.
Amer.Min.(1962) 47, 196; Lapis 2001(1), 11-40
USA
 
  • Arizona
    • Cochise Co.
      • Tombstone Hills
        • Tombstone District
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 379.
  • Utah
    • Juab Co.
      • East Tintic Mts
        • Tintic District
          • Mammoth
            • Mammoth Peak
Collected by and in the collection of Brent Thorne. Raman analyzed by Bob Housley.
Mineral and/or Locality  
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