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Apuanite

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About ApuaniteHide

Apuan Alps - Panorama from Garfagnana

Apuan Alps, Lucca Province, Tuscany, Italy
Formula:
Fe2+Fe3+4Sb3+4O12S
Colour:
Black
Lustre:
Metallic
Hardness:
4 - 5
Specific Gravity:
5.33
Crystal System:
Tetragonal
Name:
For the Apuan Alps, Italy, where it was found.
This page provides mineralogical data about Apuanite.


Classification of ApuaniteHide

Approved
4.JA.25

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
A : Arsenites, antimonites, bismuthites; without additional anions, without H2O
45.1.9.1

45 : ACID AND NORMAL ANTIMONITES AND ARSENITES
1 : Miscellaneous
4.10

4 : Oxysulphides

Physical Properties of ApuaniteHide

Metallic
Transparency:
Opaque
Colour:
Black
Hardness:
4 - 5 on Mohs scale
Hardness:
VHN20=240 - 480 kg/mm2 - Vickers
Cleavage:
Perfect
on {110}
Density:
5.33 g/cm3 (Measured)    5.22 g/cm3 (Calculated)

Optical Data of ApuaniteHide

Type:
Uniaxial
Reflectivity:
470 nmR1=19.1%R2= 20.8%
546 nmR1=21.9%R2= 19.6%
589 nmR1=21.6%R2= 18.4%
650 nmR1=19.6%R2= 16.9%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 21.9%.
R1 shown in black, R2 shown in red

Chemical Properties of ApuaniteHide

Formula:
Fe2+Fe3+4Sb3+4O12S
IMA Formula:
(Fe2+Fe3+2)(Fe3+2Sb3+4)O12S

Crystallography of ApuaniteHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
P42/mbc
Cell Parameters:
a = 8.372 Å, c = 17.974 Å
Ratio:
a:c = 1 : 2.147
Unit Cell V:
1,259.80 ų (Calculated from Unit Cell)
Z:
4
Morphology:
prismatic crystals, thick-tabular on {001} and bounded by {110}, {112} and {114}

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.168 (100)
1.922 (47)
2.957 (43)
1.647 (30)
2.646 (23)
2.434 (17)
5.90 (15)
Comments:
Recorded on material from the type locality

Type Occurrence of ApuaniteHide

General Appearance of Type Material:
Commonly massive; rarely as prismatic, thick tabular crystals
Place of Conservation of Type Material:
University of Pisa, Pisa, Italy (No. 3202);
National School of Mines, Paris, France
Geological Setting of Type Material:
In an iron deposit, in baryte; formed by low-grade metamorphic processes at the contact between phyllites and dolostones.
Associated Minerals at Type Locality:

Synonyms of ApuaniteHide

Other Language Names for ApuaniteHide

German:Apuanit
Spanish:Apuanita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Versiliaite7 photos of Apuanite associated with Versiliaite on mindat.org.
Cinnabar2 photos of Apuanite associated with Cinnabar on mindat.org.
Calcite2 photos of Apuanite associated with Calcite on mindat.org.
Pyrite1 photo of Apuanite associated with Pyrite on mindat.org.
Hematite1 photo of Apuanite associated with Hematite on mindat.org.
Fluorite1 photo of Apuanite associated with Fluorite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.JA.05LeiteiteZn(As2O4)Mon. 2/m : P21/b
4.JA.10ReineriteZn3(AsO3)2Orth.
4.JA.15KaribibiteFe3+3(As3+O2)4(As3+2O5)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
4.JA.20KusachiiteCuBi2O4Tet.
4.JA.20SchafarzikiteFe2+Sb3+2O4Tet. 4/mmm (4/m 2/m 2/m) : P42/mbc
4.JA.20TrippkeiteCu2+As3+2O4Tet. 4/mmm (4/m 2/m 2/m) : P42/mbc
4.JA.30VersiliaiteFe2Fe4Sb6O16SOrth.
4.JA.35SchneiderhöhniteFe2+Fe3+3As3+5O13Tric. 1 : P1
4.JA.40Zimbabweite(Na,K)2PbAs4(Ta,Nb,Ti)4O18Orth.
4.JA.45LudlockitePbFe3+4As3+10O22Tric. 1 : P1
4.JA.50PaulmooreitePb2[As2O5]Mon. 2/m : P21/b
4.JA.55StibivaniteSb2VO5Orth.
4.JA.60Chadwickite(UO2)[HAsO3]Tet.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

4.1BazhenoviteCa8S2(S3)(S2O3)(OH)12 · 20H2OMon. 2/m : P21/b
4.2KermesiteSb2S2OTric. 1 : P1
4.3SarabauiteCaSb3+10S6O10Mon. 2/m : B2/b
4.4SchöllhorniteNa0.3CrS2 · H2OTrig.
4.5Yushkinite(Mg,Al)V4+S2(OH)2Hex.
4.6VyalsoviteFeCaAlS(OH)5Orth.
4.7Valleriite(Fe2+,Cu)4(Mg,Al)3S4(OH,O)6Hex.
4.8TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10
4.9Haapalaite(Fe2+,Ni)2(Mg,Fe2+)1.61S2(OH)3.22Hex.
4.11VersiliaiteFe2Fe4Sb6O16SOrth.

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 ApuaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mellini, M., Merlino, S., Orlandi, P. (1979) Versiliaite and apuanite, two new minerals from the Apuan Alps, Italy. American Mineralogist: 64: 1230-1234.
Mellini, M., Merlino, S. (1979) Versiliaite and apuanite: derivative structures related to schafarzikite. American Mineralogist: 64: 1235-1242.
Mellini, M., Amouric, M., Baronnet, A., Mercuriot, G. (1981) Microstructures and nonstoichiometry in schafarzikite-like minerals. American Mineralogist: 66: 1073-1079.
Anthony, J. W. et al. (1997) Handbook of Mineralogy, Vol. 3, 19.

Internet Links for ApuaniteHide

Localities for ApuaniteHide

ⓘ - 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.
Italy (TL)
 
  • Tuscany
    • Lucca Province
      • Apuan Alps
        • Stazzema
          • Ponte Stazzemese
Mellini M., Merlino S., Orlandi P., 1979. Versiliaite and apuanite, two new minerals from the Apuane Alps, Italy. Amer. Miner., 64: 1230-1234. Orlandi P., Dini A., 2004. Die Mineralien der Buca della Vena-Mine, Apuaner Berge, Toskana (Italien). Lapis, 1: 11-24.
Mineral and/or Locality  
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