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Benyacarite

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Formula:
(H
 
2
O,K)
 
2
(Mn
2+
 
,Fe
2+
 
)
 
2
(Fe
3+
 
,Ti)
 
2
Ti(PO
 
4
)
 
4
(O,F)
 
2
· 14H
 
2
O
System:OrthorhombicColour:Light greenish yellow to ...
Lustre:VitreousHardness:2½ - 3
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 Ares, 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 Benyacarite

IMA status:Approved
Strunz 8th edition ID:7/D.33-30
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:42.11.21.4

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

Type Locality:El Criollo Mine, Cerro Blanco pegmatite district, Tanti, Punilla Department, Córdoba, Argentina
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}
Year of Discovery:1993
Geological Setting of type material:Late stage phosphate mineralization in a granite pegmatite
Associated Minerals at type locality:
TripliteStrengiteRockbridgeitePhosphosideritePachnolite
LipscombiteLibetheniteHentscheliteFluorapatiteFluellite
DufréniteBermanite

Occurrences of Benyacarite

Geological Setting:Late stage phosphate mineralization in a granite pegmatite

Physical Properties of Benyacarite

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

Crystallography of Benyacarite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pbca {P21/b 21/c 21/a}
Space Group Setting:Pbca
Cell Parameters:a = 10.561Å, b = 20.585Å, c = 12.51Å
Ratio:a:b:c = 0.513 : 1 : 0.608
Unit Cell Volume:V 2,719.65 ų (Calculated from Unit Cell)
Z:4

Optical Data of Benyacarite

Type:Biaxial (+)
RI values: nα = 1.612 nβ = 1.621 nγ = 1.649
2V:Measured: 60° , Calculated: 60°
Birefringence:0.037
Maximum Birefringence:δ = 0.037

Chart 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 Benyacarite

Formula:
(H
 
2
O,K)
 
2
(Mn
2+
 
,Fe
2+
 
)
 
2
(Fe
3+
 
,Ti)
 
2
Ti(PO
 
4
)
 
4
(O,F)
 
2
· 14H
 
2
O
Simplified for copy/paste:(H2O,K)2(Mn2+,Fe2+)2(Fe3+,Ti)2Ti(PO4)4(O,F)2·14H2O
Essential elements:Fe, H, Mn, O, P, Ti
All elements listed in formula:F, Fe, H, K, Mn, O, P, Ti

Relationship of Benyacarite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.DH.05Minyulite
KAl
 
2
(PO
 
4
)
 
2
(OH,F) · 4H
 
2
O
8.DH.10Leucophosphite
KFe
3+
2
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
8.DH.10Spheniscidite
(NH
 
4
,K)(Fe
3+
 
,Al)
 
2
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
8.DH.10Tinsleyite
KAl
 
2
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
8.DH.15Jahnsite-(CaMnFe)
{Ca}{Mn
2+
 
}{Fe
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Jahnsite-(CaMnMg)
{Ca}{Mn
2+
 
}{(Mg,Fe
2+
 
)
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Jahnsite-(CaMnMn)
{Ca}{Mn
2+
 
}{Mn
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Keckite
CaMn
2+
 
Fe
3+
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
3
(H
 
2
O)
 
7
8.DH.15Rittmannite
{(Mn
2+
 
,Ca)}{Mn
2+
 
}{(Fe
2+
 
,Mn
2+
 
,Mg)
 
2
}{(Al,Fe
3+
 
)
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Whiteite-(CaFeMg)
{Ca}{(Fe
2+
 
,Mn
2+
 
)}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Whiteite-(CaMnMg)
{Ca}{Mn
2+
 
}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Whiteite-(MnFeMg)
{(Mn
2+
 
,Ca)}{(Fe
2+
 
,Mn
2+
 
)}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Jahnsite-(MnMnMn)
{Mn
2+
 
}{Mn
2+
 
}{Mn
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Kaluginite
(Mn
2+
 
,Ca)MgFe
3+
 
(PO
 
4
)
 
2
(OH) · 4H
 
2
O
8.DH.15Jahnsite-(CaFeFe)
{Ca}{Fe
2+
 
}{Fe
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Jahnsite-(NaFeMg)
NaFe
3+
 
Mg
 
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Jahnsite-(NaMnMg)
{Na}{Mn
3+
 
}{Mg
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.15Jahnsite-(CaMgMg)
{Ca}{Mg}{Mg
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.20Manganosegelerite
(Mn
2+
 
,Ca)(Mn
2+
 
,Fe
2+
 
,Mg)Fe
3+
 
(PO
 
4
)
 
2
(OH) · 4H
 
2
O
8.DH.20Overite
CaMgAl(PO
 
4
)
 
2
(OH) · 4H
 
2
O
8.DH.20Segelerite
Ca
 
2
Mg
 
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
· 8H
 
2
O
8.DH.20Wilhelmvierlingite
CaMnFe
3+
 
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
8.DH.20Juonniite
CaMgSc(PO
 
4
)
 
2
(OH) · 4H
 
2
O
8.DH.25Calcioferrite
Ca
 
2
Fe
3+
2
(PO
 
4
)
 
3
(OH) · 7H
 
2
O
8.DH.25Kingsmountite
Ca
 
4
(Fe
2+
 
,Mn
2+
 
)Al
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 12H
 
2
O
8.DH.25Montgomeryite
Ca
 
4
MgAl
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 12H
 
2
O
8.DH.25Zodacite
Ca
 
4
Mn
2+
 
Fe
3+
4
(PO
 
4
)
 
6
(OH)
 
4
· 12H
 
2
O
8.DH.30Arseniosiderite
Ca
 
2
Fe
3+
3
(AsO
 
4
)
 
3
O
 
2
· 3H
 
2
O
8.DH.30Kolfanite
Ca
 
2
Fe
3+
2
(AsO
 
4
)
 
3
O
 
2
· 2H
 
2
O
8.DH.30Mitridatite
Ca
 
2
Fe
3+
3
(PO
 
4
)
 
3
O
 
2
· 3H
 
2
O
8.DH.30Pararobertsite
Ca
 
2
Mn
3+
3
(PO
 
4
)
 
3
O
 
2
· 3H
 
2
O
8.DH.30Robertsite
Ca
 
3
Mn
3+
4
(PO
 
4
)
 
3
O
 
2
· 3H
 
2
O
8.DH.30Sailaufite
(Ca,Na,☐)
 
2
Mn
3+
3
(AsO
 
4
)
 
2
(CO
 
3
)O
 
2
· 3H
 
2
O
8.DH.35Mantienneite
KMg
 
2
Al
 
2
Ti(PO
 
4
)
 
4
(OH)
 
3
· 15H
 
2
O
8.DH.35Paulkerrite
K(Mg,Mn
2+
 
)
 
2
(Fe
3+
 
,Al,Ti,Mg)
 
2
Ti(PO
 
4
)
 
4
(OH)
 
3
· 15H
 
2
O
8.DH.40Xanthoxenite
Ca
 
4
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
· 3H
 
2
O
8.DH.45Mahnertite
NaCu
 
3
(AsO
 
4
)
 
2
Cl · 5H
 
2
O
8.DH.50Andyrobertsite
KCdCu
 
5
(AsO
 
4
)
 
4
(H
 
2
AsO
 
4
) · 2H
 
2
O
8.DH.50Calcioandyrobertsite
KCaCu
 
5
(AsO
 
4
)
 
4
(H
 
2
AsO
 
4
) · 2H
 
2
O
8.DH.55Englishite
K
 
3
Na
 
2
Ca
 
10
Al
 
15
(PO
 
4
)
 
21
(OH)
 
7
· 26H
 
2
O
8.DH.60Bouazzerite
Bi
 
6
(Mg,Co)
 
11
Fe
3+
14
(AsO
 
4
)
 
18
(OH)
 
4
O
 
12
· 86H
 
2
O

Other Names for Benyacarite

Synonyms:
IMA1995-002
Other Languages:
German:Benyacarit
Russian:Бенякарит
Spanish:Benyacarita
Varieties:
Matveevite

Other Information

Fluorescence in UV light:Not fluorescent.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Benyacarite

Reference List:

- +
Mineralogical Record: 29: 233-234.

FRANCESCO DEMARTIN1, HEBE DINA GAY, CARLO MARIA GRAMACCIOLI, TULLIO PILATI, 1997, BENYACARITE, A NEW TITANIUM-BEARING PHOSPHATE MINERAL SPECIES FROM CERRO BLANCO, ARGENTINA, Canadian Mineralogist: 35: 707-712.

Zeitschrift für Kristallographie: 208: 57-71.

Keck, E., Witzke, T., Pöllmann, H. & Friese, K. (1998): Benyacarit aus ostbayerischen und portugiesischen Pegmatiten. Aufschluss 49, 281-285.

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.

Internet Links for Benyacarite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Benyacarite details from Handbook of Mineralogy (PDF)
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  • Localities for Benyacarite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Argentina
     
    • Córdoba
      • Punilla Department
        • Tanti
          • Cerro Blanco pegmatite district
    Zeitschr. Krist.(1993): 208: 57-71; Demartin F, Gay H D, Gramaccioli C M, Pilati T (1997) Benyacarite, a new titanium-bearing phosphate mineral species from Cerro Blanco, Argentina. The Canadian Mineralogist 35, 707-712
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Horní Slavkov (Schlaggenwald)
          • 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.
    • Moravia (Mähren; Maehren)
      • Vysočina Region
        • Velké Meziříčí
    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
        • Oberpfälzer Wald
          • Vohenstrauß
            • Pleystein
    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
              • Hagendorf
    Anthony, Bideaux, Bladh, Nichols: Handbook of Mineralogy, Vol. IV
    Morocco
     
    • Marrakech-Tensift-El Haouz Region
      • El Kelaâ des Sraghna Province
        • Sidi Bou Othmane
    Georges FAVREAU collection
    Portugal
     
    • Guarda District
      • 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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