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Yazganite

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Formula:
NaFe
3+
2
(Mg,Mn
2+
 
)(AsO
 
4
)
 
3
 · H
 
2
O
System:MonoclinicColour:Brown to brown-black
Hardness:5
Member of:Alluaudite Group
Name:For Dr. Evren Yazgan (1943-), Turkish geologist, who collected the samples containing the mineral.


Alluaudite Group.

Structure is a variant of the Johillerite structure. The first hydrated mineral in this group.

Classification of Yazganite

IMA status:Approved 2003
Strunz 8th edition ID:7/A.07-35
Nickel-Strunz 10th (pending) edition ID:8.AC.10

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
Dana 7th edition ID:38.2.7.5
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Type Occurrence of Yazganite

Type Locality:Erciyes volcanic complex, Kayseri Province, Central Anatolia Region, Turkey
Year of Discovery:2005
Geological Setting of type material:in andesitic rocks of the volcanic complex of Erciyes.
Associated Minerals at type locality:
TridymiteRealgarOrpimentMagnetiteHematite
Cassiterite

Physical Properties of Yazganite

Lustre:Adamantine, Metallic
Diaphaneity (Transparency):Translucent
Colour:Brown to brown-black
Streak:Bright brown to yellow-gray
Hardness (Mohs):5
Density (measured):4.18 g/cm3
Density (calculated):4.19 g/cm3

Crystallography of Yazganite

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 = 12.181Å, b = 12.807Å, c = 6.6391Å
β = 112.441°
Ratio:a:b:c = 0.951 : 1 : 0.518
Unit Cell Volume:V 957.28 ų (Calculated from Unit Cell)
Z:4
Morphology:Isolated prismatic crystals or aggregates formed by intergrown perfect crystals to 10x3x2 mm maximum size. Crystals elongated along the c axis and slightly flattened on {010}.
Twinning:Not observed.
X-Ray Powder Diffraction:
d-spacingIntensity
6.40(20)
5.63(20)
3.575(30)
3.202(40)
2.917(35)
2.768(100)
2.611(40)
Comments:From type description.

Optical Data of Yazganite

Type:Biaxial (-)
RI values: nα = 1.870 nβ = 1.897 nγ = 1.900
2V:Measured: 35° , Calculated: 36.5°
Maximum Birefringence:δ = 0.030

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Pleochroism:Visible
Comments:Moderate.
a = Orange-brown, yellow
y,β = Grayish yellow, colourless

Chemical Properties of Yazganite

Formula:
NaFe
3+
2
(Mg,Mn
2+
 
)(AsO
 
4
)
 
3
 · H
 
2
O
Essential elements:As, Fe, H, Mg, Na, O
All elements listed in formula:As, Fe, H, Mg, Mn, Na, O

Relationship of Yazganite to other Species

Member of:Alluaudite Group
Other Members of Group:

- +
Alluaudite
(Na,Ca)Mn
2+
 
(Fe
3+
 
,Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(PO
 
4
)
 
3
Alluaudite-Ca□
□
 
4
Ca
 
4
Mn
2+
4
Fe
3+
8
(PO
 
4
)
 
12
Alluaudite-Na□
□
 
4
Na
 
4
Mn
2+
4
Fe
3+
8
(PO
 
4
)
 
12
Arseniopleite
NaCaMn
2+
 
(Mn
2+
 
,Mg)
 
2
(AsO
 
4
)
 
3
Bradaczekite
NaCu
 
4
(AsO
 
4
)
 
3
Caryinite
(Na,Pb)(Ca,Na)(Ca,Mn
2+
 
)(Mn
2+
 
,Mg,Fe
3+
 
)
 
2
(AsO
 
4
)
 
3
Ferroalluaudite
(Na,Ca)Fe
2+
 
(Fe
3+
 
,Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)
 
3
Ferroalluaudite-NaNa
Na
 
4
Na
 
4
Fe
2+
4
Fe
3+
8
(PO
 
4
)
 
12
Ferrohagendorfite
NaCaFe
2+
 
Fe
2+
2
(PO
 
4
)
 
3
Groatite
NaCaMn
 
2
(PO
 
4
)(HPO
 
4
)
 
2
Hagendorfite
NaCaMn
2+
 
Fe
2+
2
(PO
 
4
)
 
3
Johillerite
Na(Mg,Zn)
 
3
Cu(AsO
 
4
)
 
3
Maghagendorfite
NaMn(Mg,Fe,Fe)
 
3
(PO
 
4
)
 
3
Nickenichite
Na
 
0.8
Ca
 
0.4
Cu
 
0.4
(Mg,Fe)
 
3
(AsO
 
4
)
 
3
O'Danielite
Na(Zn,Mg)
 
3
H
 
2
(AsO
 
4
)
 
3
Varulite
NaCaMn
2+
 
Mn
2+
2
(PO
 
4
)
 
3
Related Minerals - Nickel-Strunz Grouping):

- +
8.AC.05Howardevansite
NaCuFe
 
2
(VO
 
4
)
 
3
8.AC.10Alluaudite
(Na,Ca)Mn
2+
 
(Fe
3+
 
,Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(PO
 
4
)
 
3
8.AC.10Arseniopleite
NaCaMn
2+
 
(Mn
2+
 
,Mg)
 
2
(AsO
 
4
)
 
3
8.AC.10Caryinite
(Na,Pb)(Ca,Na)(Ca,Mn
2+
 
)(Mn
2+
 
,Mg,Fe
3+
 
)
 
2
(AsO
 
4
)
 
3
8.AC.10Ferroalluaudite
(Na,Ca)Fe
2+
 
(Fe
3+
 
,Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)
 
3
8.AC.10Hagendorfite
NaCaMn
2+
 
Fe
2+
2
(PO
 
4
)
 
3
8.AC.10Johillerite
Na(Mg,Zn)
 
3
Cu(AsO
 
4
)
 
3
8.AC.10Maghagendorfite
NaMn(Mg,Fe,Fe)
 
3
(PO
 
4
)
 
3
8.AC.10Nickenichite
Na
 
0.8
Ca
 
0.4
Cu
 
0.4
(Mg,Fe)
 
3
(AsO
 
4
)
 
3
8.AC.10Varulite
NaCaMn
2+
 
Mn
2+
2
(PO
 
4
)
 
3
8.AC.10Ferrohagendorfite
NaCaFe
2+
 
Fe
2+
2
(PO
 
4
)
 
3
8.AC.10Bradaczekite
NaCu
 
4
(AsO
 
4
)
 
3
8.AC.10Groatite
NaCaMn
 
2
(PO
 
4
)(HPO
 
4
)
 
2
8.AC.15Bobfergusonite
Na
 
2
Mn
 
5
FeAl(PO
 
4
)
 
6
8.AC.15Ferrowyllieite
(Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO
 
4
)
 
3
8.AC.15Qingheiite
NaMn
3+
 
Mg(Al,Fe
3+
 
)(PO
 
4
)
 
3
8.AC.15Rosemaryite
(Na,Ca,Mn)(Mn,Fe
2+
 
)(Fe
3+
 
,Mg)Al(PO
 
4
)
 
3
8.AC.15Wyllieite
(Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO
 
4
)
 
3
8.AC.15Ferrorosemaryite
◻NaFe
2+
 
Fe
3+
 
Al(PO
 
4
)
 
3
8.AC.15Qingheiite-(Fe2+)
Na
 
2
Fe
2+
 
MgAl(PO
 
4
)
 
3
8.AC.18Manitobaite
Na
 
16
Mn
2+
 
 
25
Al
 
8
(PO
 
4
)
 
30
8.AC.20Marićite
NaFe
2+
 
(PO
 
4
)
8.AC.25Berzeliite
NaCa
 
2
(Mg,Mn
2+
 
)
 
2
(AsO
 
4
)
 
3
8.AC.25Manganberzeliite
(Ca,Na)
 
3
(Mn
2+
 
,Mg)
 
2
(AsO
 
4
)
 
3
8.AC.25Palenzonaite
(Ca,Na)
 
3
CaMn
2+
2
(VO
 
4
)
 
3
8.AC.25Schäferite
Ca
 
2
NaMg
 
2
(VO
 
4
)
 
3
8.AC.30Brianite
Na
 
2
CaMg(PO
 
4
)
 
2
8.AC.35Vitusite-(Ce)
Na
 
3
(Ce,La,Nd)(PO
 
4
)
 
2
8.AC.40Olgite
(Sr,Ba)(Na,Sr,REE)
 
2
Na(PO
 
4
)
 
2
8.AC.40Bario-olgite
(Ba,Sr)(Na,Sr,REE)
 
2
Na(PO
 
4
)
 
2
 ·
8.AC.45Strontiowhitlockite
Sr
 
9
Mg(PO
 
4
)
 
6
(HPO
 
4
)
8.AC.45Whitlockite
Ca
 
9
Mg(PO
 
4
)
 
6
(HPO
 
4
)
8.AC.45Merrillite
Ca
 
9
NaMg(PO
 
4
)
 
7
8.AC.45Tuite
Ca
 
3
(PO
 
4
)
 
2
8.AC.45Ferromerrillite
Ca
 
9
NaFe
2+
 
(PO
 
4
)
 
7
8.AC.45Bobdownsite
Ca
 
9
Mg(PO
 
4
)
 
6
(PO
 
3
F)
8.AC.50Chladniite
{Ca}{Na
 
8
}{Ca
 
4
Na
 
4
}{(Mg,Fe
2+
 
)
 
43
}(PO
 
4
)
 
36
8.AC.50Fillowite
{Mn
2+
 
}{Na
 
8
}{Ca
 
4
Na
 
4
}{(Mn
2+
 
,Fe
2+
 
)
 
43
}(PO
 
4
)
 
36
8.AC.50Johnsomervilleite
{Ca}{Na
 
6
[ ]
 
2
}{Ca
 
6
Na
 
2
}{(Fe
2+
 
,Mg,Mn
2+
 
)
 
43
}(PO
 
4
)
 
36
8.AC.50Galileiite
{Fe
2+
 
}{Na
 
8
}{Fe
2+
4
Na
 
4
}{Fe
2+
43
}(PO
 
4
)
 
36
8.AC.50Stornesite-(Y)
{(Y, Ca)}{Na
 
6
◻
 
2
}{(Ca,Na)
 
8
}{(Mg,Fe
2+
 
)
 
43
}(PO
 
4
)
 
36
8.AC.50Xenophyllite
Na
 
4
Fe
2+
7
(PO
 
4
)
 
6
8.AC.55Harrisonite
Ca(Fe
2+
 
,Mg)
 
6
(PO
 
4
)
 
2
(SiO
 
4
)
 
2
8.AC.60Kosnarite
KZr
 
2
(PO
 
4
)
 
3
8.AC.65Panethite
(Na,Ca)
 
2
(Mg,Fe
2+
 
)
 
2
(PO
 
4
)
 
2
8.AC.70Stanfieldite
Ca
 
7
Ca
 
2
Mg
 
9
(PO
 
4
)
 
12
8.AC.75Ronneburgite
K
 
2
MnV
 
4
O
 
12
8.AC.80Tillmannsite
(Ag
 
3
Hg)(VO
 
4
,AsO
 
4
)
8.AC.85Filatovite
K(Al,Zn)
 
2
(As,Si)
 
2
O
 
8
Related Minerals - Dana Grouping):

- +
38.2.7.1O'Danielite
Na(Zn,Mg)
 
3
H
 
2
(AsO
 
4
)
 
3
38.2.7.2Johillerite
Na(Mg,Zn)
 
3
Cu(AsO
 
4
)
 
3
38.2.7.3Nickenichite
Na
 
0.8
Ca
 
0.4
Cu
 
0.4
(Mg,Fe)
 
3
(AsO
 
4
)
 
3

Other Names for Yazganite

Synonyms:
IMA2003-033
Other Languages:
German:Yazganit
Russian:Язганит

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 Yazganite

Reference List:

- +
Sarp, H., Černý, R. (2005) Yazganite, NaFe3+2(Mg,Mn)(AsO4)3·H2O, a new mineral: its description and crystal structure. European Journal of Mineralogy 17(2), 367-374.

Internet Links for Yazganite

Search Engines:
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    • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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    • Localities for Yazganite

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    (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.
    Turkey
     
    • Central Anatolia Region
      • Kayseri Province
    		Sarp, H., Černý, R. (2005) Yazganite, NaFe3+2(Mg,Mn)(AsO4)3·H2O, a new mineral: its description and crystal structure. European Journal of Mineralogy 17(2), 367-374.
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