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Gayite

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Big Photo

Gigante pegmatite, Punilla Department, Córdoba, Argentina
© Norman King




Formula:
NaMn
2+
 
Fe
3+
5
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
System:Monoclinic
Member of:Dufrénite Group


Dufrénite Group.

Classification of Gayite

IMA status:Approved 2009
Nickel-Strunz 10th (pending) edition ID:8.DK.15

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
K : With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
Dana 8th edition ID:42.9.1.5

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)7(XO4)4Zq·xH2O
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Type Occurrence of Gayite

Type Locality:Gigante pegmatite, Punilla Department, Córdoba, Argentina

Crystallography of Gayite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b {B1 1 2/b} {C2/c} {C1 2/c 1}
Cell Parameters:a = 25.975(3) Å, b = 5.1766(4) Å, c = 13.929(11) Å
β = 111.293(2)°
Ratio:a:b:c = 5.018 : 1 : 2.691
Unit Cell Volume:V 1,745.07 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
5.045 (60)
4.147 (37)
3.424 (71)
3.179 (100)
2.881 (42)
2.426 (36)
2.109 (39)
1.585 (50)

Chemical Properties of Gayite

Formula:
NaMn
2+
 
Fe
3+
5
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
Essential elements:Fe, H, Mn, Na, O, P
All elements listed in formula:Fe, H, Mn, Na, O, P

Relationship of Gayite to other Species

Member of:Dufrénite Group
Other Members of Group:

- +
Dufrénite
Ca
 
0.5
Fe
2+
 
Fe
3+
5
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
Natrodufrénite
NaFe
2+
 
(Fe
3+
 
,Al)
 
5
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.DK.Richelsdorfite
Ca
 
2
Cu
 
5
Sb(AsO
 
4
)
 
4
(OH)
 
6
Cl · 6H
 
2
O
8.DK.10Bariopharmacosiderite
Ba
 
0.5
Fe
3+
4
(AsO
 
4
)
 
3
(OH)
 
4
 · 5H
 
2
O
8.DK.10Pharmacosiderite
KFe
3+
4
(AsO
 
4
)
 
3
(OH)
 
4
 · 6-7H
 
2
O
8.DK.10Natropharmacosiderite
(Na,K)Fe
3+
4
(AsO
 
4
)
 
3
(OH)
 
4
 · 6-7H
 
2
O
8.DK.10Hydroniumpharmacosiderite
(H
 
3
O)Fe
 
4
(AsO
 
4
)
 
3
(OH)
 
4
 · 4H
 
2
O
8.DK.12Pharmacoalumite
KAl
 
4
(AsO
 
4
)
 
3
(OH)
 
4
 · 6.5H
 
2
O
8.DK.12Natropharmacoalumite
NaAl
 
4
(AsO
 
4
)
 
3
(OH)
 
4
 · 4H
 
2
O
8.DK.12Bariopharmacoalumite
Ba
 
0.5
Al
 
4
(AsO
 
4
)
 
3
(OH)
 
4
 · 4H
 
2
O
8.DK.15Burangaite
NaFe
2+
 
Al
 
5
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
8.DK.15Dufrénite
Ca
 
0.5
Fe
2+
 
Fe
3+
5
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
8.DK.15Natrodufrénite
NaFe
2+
 
(Fe
3+
 
,Al)
 
5
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
8.DK.15Matioliite
NaMgAl
 
5
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
8.DK.20Kidwellite
NaFe
3+
9
(PO
 
4
)
 
6
(OH)
 
11
 · 3H
 
2
O
8.DK.25Bleasdaleite
(Ca,Fe
3+
 
)
 
2
Cu
 
5
(Bi,Cu)(PO
 
4
)
 
4
(H
 
2
O,OH,Cl)
 
13
8.DK.30Matulaite
(Fe
3+
 
,Al)Al
 
7
(PO
 
4
)
 
4
(PO
 
3
OH)
 
2
(OH)
 
8
(H
 
2
O)
 
8
 · 8H
 
2
O
8.DK.35Krasnovite
Ba(Al,Mg)(PO
 
4
,CO
 
3
)(OH)
 
2
 · H
 
2
O

Other Names for Gayite

Synonyms:
IMA2008-056
Other Languages:

Other Information

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 Gayite

Reference List:

- +
IMA website - Proposals approved in January 2009

Kampf, A.R., Colombo, F., Gonzalez del Tanago, J. (2010): Gayite, a new dufrenite group mineral from the Gigante granitic pegmatite, Cordoba province, Argentina. American Mineralogist, 95, (in press)

Internet Links for Gayite

Search Engines:
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    • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
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  • SpiriferMinerals.com - high quality low prices
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  • Wilensky Fine Minerals
  • Buy fine minerals and gemstones from Pala International
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    • Localities for Gayite

    Hide Locality List
    (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
    		IMA website - approvals January 2009
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