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Asbecasite

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Formula:
Ca3(Ti,Sn4+)Be2(AsO3)6(SiO4)2
Colour:
Yellow, pale yellow
Lustre:
Vitreous, Sub-Vitreous
Hardness:
6½ - 7
Specific Gravity:
3.70
Crystal System:
Trigonal
Name:
Named by S. Graeser in 1966 for the elements in its composition: As, Be, Ca, Si.
This page provides mineralogical data about Asbecasite.


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Classification of AsbecasiteHide

Approved
Approval Year:
1966
First Published:
1966
4.JB.30

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
45.1.3.1

45 : ACID AND NORMAL ANTIMONITES AND ARSENITES
1 : Miscellaneous
17.7.9

17 : Silicates Containing other Anions
7 : Silicates with vanadate, arsenate or antimonate

Physical Properties of AsbecasiteHide

Vitreous, Sub-Vitreous
Transparency:
Transparent
Colour:
Yellow, pale yellow
Streak:
Pale yellow
Hardness:
6½ - 7 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Rhombohedral {10-11}
Density:
3.70 g/cm3 (Measured)    3.71 g/cm3 (Calculated)

Optical Data of AsbecasiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.860 nε = 1.830
Birefringence:
0.03
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Optical Extinction:
Parallel

Chemical Properties of AsbecasiteHide

Formula:
Ca3(Ti,Sn4+)Be2(AsO3)6(SiO4)2
IMA Formula:
Ca3TiAs6Be2Si2O20

Crystallography of AsbecasiteHide

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
P3c1
Cell Parameters:
a = 8.364 Å, c = 15.304 Å
Ratio:
a:c = 1 : 1.83
Unit Cell V:
927.18 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Tabular rhombohedral, sometimes equant.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.04 (50)
3.84 (50)
3.23 (100)
2.41 (60)
1.75 (60)
1.57 (70)
1.32 (60)
1.15 (70)
Comments:
19-0087

Type Occurrence of AsbecasiteHide

Place of Conservation of Type Material:
Natural History Museum, Basel, Switzerland, SG750.
The Natural History Museum, London, England, 1966,222.
National Museum of Natural History, Washington, D.C., USA, 143117.
Geological Setting of Type Material:
Alpine veins.
Associated Minerals at Type Locality:

Synonyms of AsbecasiteHide

Other Language Names for AsbecasiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Cafarsite3 photos of Asbecasite associated with Cafarsite on mindat.org.
Amazonite2 photos of Asbecasite associated with Amazonite on mindat.org.
Hematite1 photo of Asbecasite associated with Hematite on mindat.org.
Metazeunerite1 photo of Asbecasite associated with Metazeunerite on mindat.org.
Quartz1 photo of Asbecasite associated with Quartz on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.JB.05Fetiasite(Fe3+,Fe2+,Ti)3(As2O5)O2Mon.
4.JB.10ManganarsiteMn3(As2O4)(OH)4
4.JB.15MagnussoniteMn10As6O18(OH,Cl)2Iso. m3m (4/m 3 2/m) : Ia3d
4.JB.15UM1984-09-AsO:ClHMnMn10As6O18(OH)ClTet. 4/mmm (4/m 2/m 2/m) : I41/acd
4.JB.20ArmangiteMn2+26(AsO3)14(HAsO3)4(CO3)Trig. 3 : P3
4.JB.25NanlingiteNa(Ca5Li)Mg12(AsO3)2[Fe(AsO3)6]F14Trig.
4.JB.35StenhuggariteCaFeSb(AsO3)2OTet.
4.JB.40TrigonitePb3Mn2+(AsO3)2(HAsO3)Mon. m
4.JB.45FinnemanitePb5(AsO3)3ClHex. 6/m : P63/m
4.JB.50GebharditePb8(As2O5)2OCl6Mon.
4.JB.55DerbyliteFe3+4Ti3Sb3+O13(OH)Mon. 2/m : P21/m
4.JB.55Tomichite(V,Fe)4Ti3AsO13(OH)Mon.
4.JB.55Graeserite(Fe3+ ,Ti)4Ti3AsO13(OH)Mon.
4.JB.60Hemloite(Ti,V3+,Fe3+,Al)12(As3+,Sb3+)2O23(OH)Tric. 1 : P1
4.JB.65FreediteCu+Pb8(AsO3)2O3Cl5Mon. 2/m : B2/m
4.JB.70GeorgiadèsitePb4(AsO3)Cl4(OH)Mon.
4.JB.75Ekatite(Fe3+,Fe2+,Zn)12(AsO3)6(AsO3,HSiO4)2(OH)6Hex.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.7.1SuzukiiteBaVSi2O7Orth.
17.7.2FranciscaniteMn2+6(V5+,☐)2(SiO4)2(O,OH)6Hex.
17.7.3Kurumsakite(Zn,Ni,Cu)8Al8V5+2Si5O35 · 27H2O (?)
17.7.4Ardennite-(As)Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6Orth. mmm (2/m 2/m 2/m)
17.7.5MedaiteMn2+6V5+Si5O18(OH)Mon.
17.7.6JohninnesiteNa2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2Tric.
17.7.7TiragalloiteMn2+4As5+Si3O12(OH)Mon. 2/m
17.7.8DixeniteCuMn2+14Fe2+(SiO4)2(As5+O4)(As3+O3)5(OH)6Trig.
17.7.10McgoverniteMn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)21Trig. 3m (3 2/m)
17.7.11KraissliteZn3(Mn,Mg)25(Fe3+,Al)(As3+O3)2[(Si,As5+)O4]10(OH)16Orth. 2 2 2 : C2 2 21
17.7.12SchalleriteMn2+16As3Si12O36(OH)17Trig. 3m : P3m1
17.7.13Nelenite(Mn,Fe)16(Si12O30)(OH)14[As3+3O6(OH)3]Mon.
17.7.14KoliciteMn2+7Zn4(AsO4)2(SiO4)2(OH)8Orth. mmm (2/m 2/m 2/m) : Cmca
17.7.15YeatmaniteZn6Mn2+9Sb5+2(SiO4)4O12Tric.
17.7.16WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]Tric. 1 : P1
17.7.17Katoptrite(Mn2+,Mg)13(Al,Fe3+)4Sb5+2(SiO4)2O20Mon. 2/m : B2/m
17.7.18ParweliteMn10Sb2As2Si2O24Mon. m : Bb
17.7.19LångbaniteMn2+4Mn3+9Sb5+O16(SiO4)2Trig. 3m : P3m1
17.7.20ChapmaniteFe3+2Sb3+(Si2O5)O3(OH)Mon. m : Bm
17.7.21Cervandonite-(Ce)(Ce,Nd,La)(Fe3+,Fe2+,Ti,Al)3O2(Si2O7)(As3+O3)(OH)Trig. 3m : R3m

Fluorescence of AsbecasiteHide

Not fluorescent

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 AsbecasiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Graeser, S. (1966) Asbecasit und Cafarsit, zwei neue Mineralien aus dem Binnatal (Kt. Wallis). Schweizerische Mineralogische und Petrographische Mitteilungen: 46: 367-375.
Fleischer, M. (1967) New mineral names. American Mineralogist: 52: 1579-1589.
Fleischer, M., Nickel, E.H. (1970) New mineral names. American Mineralogist: 55: 1810-1818.
Sacerdoti, M., Parodi, G.C., Mottana, A., Maras, A., Ventura, G.D. (1993) Asbecasite: crystal structure refinement and crystal chemistry. Mineralogical Magazine: 57: 315-322.
Roth, P. (2007) Asbecasite. in Minerals first discovered in Switzerland and minerals named after Swiss individuals, Kristallografik Verlag (Achberg Germany): 36-37.

Internet Links for AsbecasiteHide

Localities for AsbecasiteHide

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.
Italy
 
  • Latium
    • Viterbo Province
      • Vico volcanic complex (Vico Lake)
        • Vetralla
A. Maras et al. , Eur. J. Mineral. , 1995, 7, pp. 439-446.
  • Piedmont
    • Verbano-Cusio-Ossola Province
      • Ossola Valley
        • Antigorio Valley
          • Devero Valley
            • Baceno
              • Devero Alp
Guastoni, A., Pezzotta, F., Vignola, P. (2006): Characterization and genetic inferences of arsenates, sulfates and vanadates of Fe, Cu, Pb, Zn from Mount Cervandone (Western Alps, Italy). Periodico di Mineralogia, 76, 141-150.
Albertini C. (1991): L'Alpe Devero ed i suoi minerali. Edizioni Grafica P.G.A., Dormelletto (Novara), 299 pp.; Guastoni A., Pezzotta F., Vignola P. (2006): Characterization and genetic inferences of arsenates, sulfates and vanadates of Fe, Cu, Pb, Zn from Mount Cervandone (Western Alps, Italy). Per. Mineral., 76, 141-150.
Norway
 
  • Nordland
    • Sørfold
Ellingsen, H.V., Haugen, A., Raade, G., Eldjarn, K. & Berg, H.-J., (1995): Sjeldne mineraler i en amazonittpegmatitt ved Tennvatn i Nordland. Norsk Bergverksmuseums Skriftserie 9, 35-37
Switzerland
 
  • Wallis (Valais)
    • Binn Valley
      • Chummibort
Cuchet, S., van der Burgt, A. und Meisser, N. (2005): Chummibort, eine neue Fundstelle für Arsenmineralien im Binntal. Schweizer Strahler, Nr. 2, 19-29. (in German/French)
      • Kriegalp Valley (Chriegalp Valley)
Schweiz.Min.Petr.Mitt.(1966) 46, 367-375
      • Lercheltini area (Lärcheltini)
[MinRec 27:302]; American Mineralogist, Volume 79, pages 996-1002, 1994
    • Brig
      • Simplon pass area
        • Steinu Valley
Christian Bracke Collection.
Mineral and/or Locality  
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