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Benyacarite

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About BenyacariteHide

Formula:
(H2O,K)2(Mn2+,Fe2+)2(Fe3+,Ti)2Ti(PO4)4(O,F)2 · 14H2O
Colour:
Light greenish yellow to light brown
Lustre:
Vitreous
Hardness:
2½ - 3
Specific Gravity:
2.37 (Calculated)
Crystal System:
Orthorhombic
Name:
Named by Francesco Demartin, Hebe Dina Gay, Carlo Maria Gramaccioli, Tullio Pilatti in 1995 in honor of Maria Angelica R. de Benyacar (1928-), Comision Nacional de Energia Atomica, Buenos Aires, Argentina, for her contribution to mineralogical studies.
A K-dominant end-member (probably new mineral) was reported by Sejkora et al. (2006).

Compare also paulkerrite and mantienneite.




Classification of BenyacariteHide

Approved
8.DH.35

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
H : With large and medium-sized cations, (OH, etc.):RO4 < 1:1
42.11.21.4

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O

Physical Properties of BenyacariteHide

Vitreous
Transparency:
Transparent
Colour:
Light greenish yellow to light brown
Streak:
Nearly colorless
Hardness:
2½ - 3 on Mohs scale
Cleavage:
Perfect
{010} perfect
Fracture:
Irregular/Uneven
Density:
2.37 g/cm3 (Calculated)

Optical Data of BenyacariteHide

Type:
Biaxial (+)
RI values:
nα = 1.612 nβ = 1.621 nγ = 1.649
2V:
Measured: 60° , Calculated: 60°
Birefringence:
0.037
Max Birefringence:
δ = 0.037
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
none
Optical Extinction:
Parallel. XYZ = bca
Pleochroism:
Non-pleochroic

Chemical Properties of BenyacariteHide

Formula:
(H2O,K)2(Mn2+,Fe2+)2(Fe3+,Ti)2Ti(PO4)4(O,F)2 · 14H2O
IMA Formula:
KTiMn2+2Fe3+2(PO4)4OF · 15H2O

Crystallography of BenyacariteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pbca
Setting:
Pbca
Cell Parameters:
a = 10.561 Å, b = 20.585 Å, c = 12.51 Å
Ratio:
a:b:c = 0.513 : 1 : 0.608
Unit Cell V:
2,719.65 ų (Calculated from Unit Cell)
Z:
4

Type Occurrence of BenyacariteHide

General Appearance of Type Material:
Small (0.2 -0.3 mm) nearly light greenish yellow to light brown crystals with {010}, {111}, {001}, and {100}
Place of Conservation of Type Material:
Mineralogical Museum of the Department of Earth Sciences, University of Milano, Italy.
Geological Setting of Type Material:
Late stage phosphate mineralization in a granite pegmatite
Associated Minerals at Type Locality:

Synonyms of BenyacariteHide

Other Language Names for BenyacariteHide

Varieties of BenyacariteHide

MatveeviteA Mg-Al-bearing benyacarite.

Common AssociatesHide

Associated Minerals Based on Photo Data:
16 photos of Benyacarite associated with PhosphosideriteFePO4 · 2H2O
5 photos of Benyacarite associated with StrengiteFePO4 · 2H2O
3 photos of Benyacarite associated with RockbridgeiteFe2+Fe3+4(PO4)3(OH)5
2 photos of Benyacarite associated with PaulkerriteK(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2O
2 photos of Benyacarite associated with Nsutite(Mn4+,Mn2+)(O,OH)2
1 photo of Benyacarite associated with CacoxeniteFe3+24AlO6(PO4)17(OH)12 · 75H2O
1 photo of Benyacarite associated with ZwieseliteFe2+2(PO4)F
1 photo of Benyacarite associated with TorberniteCu(UO2)2(PO4)2 · 12H2O

Related Minerals - Nickel-Strunz GroupingHide

8.DH.05MinyuliteKAl2(PO4)2(OH,F) · 4H2OOrth. mm2 : Pba2
8.DH.10LeucophosphiteKFe3+2(PO4)2(OH) · 2H2OMon. 2/m : P21/b
8.DH.10Spheniscidite(NH4,K)(Fe3+,Al)2(PO4)2(OH) · 2H2OMon.
8.DH.10TinsleyiteKAl2(PO4)2(OH) · 2H2OMon.
8.DH.15Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnMn){Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15KeckiteCaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2OMon. 2/m : P2/b
8.DH.15Rittmannite{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2OMon.
8.DH.15Whiteite-(CaFeMg){Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Whiteite-(CaMnMg){Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m
8.DH.15Whiteite-(MnFeMg){(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Jahnsite-(MnMnMn){Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon.
8.DH.15Kaluginite(Mn2+,Ca)MgFe3+(PO4)2(OH) · 4H2OOrth.
8.DH.15Jahnsite-(CaFeFe){Ca}{Fe2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon.
8.DH.15Jahnsite-(NaFeMg)NaFe3+Mg2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(NaMnMg){(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMgMg){Ca}{Mg}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O
8.DH.20Manganosegelerite(Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20OveriteCaMgAl(PO4)2(OH) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20SegeleriteCa2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2OOrth. mmm (2/m 2/m 2/m) : Pcca
8.DH.20WilhelmvierlingiteCaMnFe3+(PO4)2(OH) · 2H2OOrth.
8.DH.20JuonniiteCaMgSc(PO4)2(OH) · 4H2OOrth.
8.DH.25CalcioferriteCa2Fe3+2(PO4)3(OH) · 7H2OMon. 2/m : B2/b
8.DH.25KingsmountiteCa3MnFeAl4(PO4)6(OH)4·12H2OMon. 2 : B2
8.DH.25MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2OMon. 2 : B2
8.DH.25ZodaciteCa4Mn2+Fe3+4(PO4)6(OH)4 · 12H2OMon.
8.DH.30ArseniosideriteCa2Fe3+3(AsO4)3O2 · 3H2OMon. 2/m : B2/b
8.DH.30KolfaniteCa2Fe3+3O2(AsO4)3 · 2H2OMon.
8.DH.30MitridatiteCa2Fe3+3(PO4)3O2 · 3H2OMon. 2/m : B2/b
8.DH.30PararobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. 2/m : P21/b
8.DH.30RobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. m : Bb
8.DH.30Sailaufite(Ca,Na,☐)2Mn3+3(AsO4)2(CO3)O2 · 3H2OMon.
8.DH.35MantienneiteKMg2Al2Ti(PO4)4(OH)3 · 15H2OOrth.
8.DH.35PaulkerriteK(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.40XanthoxeniteCa4Fe3+2(PO4)4(OH)2 · 3H2OTric. 1 : P1
8.DH.45MahnertiteNaCu3(AsO4)2Cl · 5H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.DH.50AndyrobertsiteKCdCu5(AsO4)4(H2AsO4) · 2H2OMon.
8.DH.50CalcioandyrobertsiteKCaCu5(AsO4)4(H2AsO4) · 2H2OMon. 2/m : P21/m
8.DH.55EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2OMon. 2/m
8.DH.60BouazzeriteBi6(Mg,Co)11Fe3+14(AsO4)18(OH)4O12 · 86H2OMon. 2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

42.11.21.1PaulkerriteK(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2OOrth. mmm (2/m 2/m 2/m) : Pbca
42.11.21.2MantienneiteKMg2Al2Ti(PO4)4(OH)3 · 15H2OOrth.

Fluorescence of BenyacariteHide

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 BenyacariteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Demartin, F., Pilati, T., Gay, H.D., and Gramaccioli, C.M. (1993) The crystal structure of a mineral related to paulkerrite. Zeits. Kristallogr.: 208: 57–71.
Demartin, F., Gay, H.D., Gramaccioli, C.M., and Pilati, T. (1997) Benyacarite, a new titanium-bearing phosphate mineral species from Cerro Blanco, Argentina. Canadian Mineralogist: 35: 707–712.
Jambor, J.L. and Roberts, A.C. (1998) New mineral names. American Mineralogist: 83: 400-403.
Keck, E., Witzke, T., Pöllmann, H., and Friese, K. (1998) Benyacarit aus ostbayerischen und portugiesischen Pegmatiten. Aufschluss: 49: 281-285.
Sejkora, J., Škoda, R., Ondruš, P., Beran, P., and Susser, C. (2006) Mineralogy of phosphate accumulations in the Huber stock, Krásno ore district, Slavkovský les area, Czech Republic. Journal of the Czech Geological Society: 51: 103-147.
Mineralogical Record: 29: 233-234.

Internet Links for BenyacariteHide

Localities for BenyacariteHide

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.
Argentina (TL)
 
  • Córdoba Province
    • Punilla Department
      • Tanti
        • Cerro Blanco pegmatite district
Demartin, F., Pilati, T., Gay, H.D., and Gramaccioli, C.M. (1993) The crystal structure of a mineral related to paulkerrite. Zeits. Kristallogr.: 208: 57–71.; Demartin, F., Gay, H.D., Gramaccioli, C.M., and Pilati, T. (1997) Benyacarite, a new titanium-bearing phosphate mineral species from Cerro Blanco, Argentina. Canadian Mineralogist: 35: 707–712.; Jambor, J.L. and Roberts, A.C. (1998) New mineral names. American Mineralogist: 83: 400-403.
Czech Republic
 
  • Karlovy Vary Region
    • Sokolov District
      • Horní Slavkov
        • Krásno (Schönfeld)
Sejkora, J., Škoda, R., Ondruš, P., Beran, P. & Susser, C. (2006): Mineralogy of phosphate accumulations in the Huber stock, Krásno ore district, Slavkovský les area, Czech Republic. Journal of the Czech Geological Society 51, 103-147.
  • Vysočina Region
    • Žďár nad Sázavou District
      • Křižanov
Škoda, R., Staněk, J., Čopjaková, R.: Minerální asociace fosfátových nodulí z granitického pegmatitu od Cyrilova u Velkého Meziříčí, Moldanubikum; část 1 – primární a exsoluční fáze. Acta Mus. Moraviae, Sci. geol., 2007, 92, 59-74.
Germany
 
  • Bavaria
    • Upper Palatinate
      • Neustadt an der Waldnaab
DILL, H. & WEBER, B. (2009): Eine ungewöhnliche zink- und wismutführende Benyacarit-Paragenese von Pleystein/Oberpfalz. Geol. Bl. NO-Bayern 59 (1-4), 77-86.
Anthony, Bideaux, Bladh, Nichols: Handbook of Mineralogy, Vol. IV; Dill, H.G., Weber, B. (2009), Pleystein-City on Pegmatite, 4th International Symposium on Granitic Pegmatites, Recife, Brazil.
        • Waidhaus
Dill, H.G. (2009) The Hagendorf-Pleystein phosphate pegmatites (NE Bavaria, Germany) - A mineralogical, chronological and sedimentological overview. Estudos Geológicos: 19(2): 117-120.
KECK, E., WITZKE, T., PÖLLMANN, H., FRIESE, K. (1998): Benyacarit aus ostbayrischen und portugiesischen Pegmatiten.- Der Aufschluss, 49 (5), 281-285. Anthony, Bideaux, Bladh, Nichols: Handbook of Mineralogy, Vol. IV
Morocco
 
  • Marrakesh-Safi Region
    • Rehamna Province
      • Jebilet Mtn (Djebilet Mtn)
        • Sidi Bou Othmane
Georges FAVREAU collection
Portugal
 
  • Guarda
    • Gouveia
      • Folgosinho
Keck, E., Witzke, T., Pöllmann, H. & Friese, K. (1998): Benyacarit aus ostbayerischen und portugiesischen Pegmatiten. Aufschluss 49, 281-285.; Pedro Alves collection
    • Sabugal
      • Bendada
Christian Rewitzer collection / analysed
Pedro Alves collection
 
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