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Arrojadite-(KNa)

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Big Fish River, Dawson Mining District, Yukon Territory, Canada




Formula:
{KNa}{Na
 
2
}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
System:Monoclinic
Name:For Miguel Arrojado Lisbôa, Brazilian geologist and Redefinition after the new arrojadite nomeclature (CNMMN 05-D, October 2005).


Arrojadite Group

Classification of Arrojadite-(KNa)

IMA status:Approved 2005
Strunz 8th edition ID:7/B.20-15
Nickel-Strunz 10th (pending) edition ID:8.BF.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
F : With medium-sized and large cations, (OH, etc.):RO4< 0.5:1
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Type Occurrence of Arrojadite-(KNa)

Type Locality:Rapid Creek, Dawson Mining District, Yukon Territory, Canada

Crystallography of Arrojadite-(KNa)

Crystal System:Monoclinic
Class (H-M):m - Domatic
Space Group:Bb {B1 1b} {Cc} {C1c1}
Cell Parameters:a = 16.552Å, b = 10.0529Å, c = 24.6477Å
β = 106.509°
Ratio:a:b:c = 1.646 : 1 : 2.452
Unit Cell Volume:V 3,932.19 ų (Calculated from Unit Cell)

Chemical Properties of Arrojadite-(KNa)

Formula:
{KNa}{Na
 
2
}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
All elements listed in formula:Al, Ca, Fe, H, K, Na, O, P

Relationship of Arrojadite-(KNa) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.BF.05Arrojadite-(KFe)
{KNa}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Dickinsonite-(KMnNa)
{KNa}{Mn
2+
 
[ ]}{Ca}{Na
 
3
}{Mn
2+
13
}{Al}[(OH)
 
2
|(PO
 
4
)
 
12
]
8.BF.05Arrojadite-(BaFe)
{Ba[ ]}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Arrojadite-(SrFe)
{Sr[ ]}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Arrojadite-(PbFe)
{Pb[ ]}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Fluorarrojadite-(BaFe)
{Ba[ ]}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[F
 
2
|HPO
 
4
|(PO4)
 
11
]
8.BF.05Arrojadite-(NaFe)
{Na
 
2
}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Arrojadite-(BaNa)
{Ba[ ]}{Na
 
2
}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Fluorarrojadite-(KNa)
{KNa}{Na
 
2
}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[F
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.05Fluorarrojadite-(NaFe)
{Na
 
2
}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[F
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
8.BF.10Samuelsonite
(Ca,Ba)Ca
 
8
Fe
2+
2
Mn
2+
2
Al
 
2
[(OH)
 
2
|(PO
 
4
)
 
10
]
8.BF.15Griphite
Na
 
4
Li
 
2
Ca
 
6
(Mn
2+
 
,Fe
2+
 
,Mg)
 
19
Al
 
8
[(F,OH)|(PO
 
4
)
 
3
]
 
8
8.BF.20Nabiasite
BaMn
2+
9
[(OH)
 
2
|(VO
 
4
,AsO
 
4
)
 
6
]

Other Names for Arrojadite-(KNa)

Synonyms:
IMA2005-047
Other Languages:
German:Arrojadit-(KNa)
Russian:Арроядит-(KNa)

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 Arrojadite-(KNa)

Reference List:Cámara, F., Oberti, R., Chopin, C., Medenbach, O. (2006): The arrojadite enigma: I. A new formula and a new model for the arrojadite structure. American Mineralogist, 91, 1249-1259

Chopin, C., Oberti, R., Cámara, F. (2006): The arrojadite enigma: II. Compositional space, new members and nomenclature of the group. American Mineralogist, 91, 1260-1270.

Internet Links for Arrojadite-(KNa)

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    Localities for Arrojadite-(KNa)

    (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.
    Canada
     
    • Yukon Territory
      • Dawson Mining District
    		American Mineralogist (2006) 91, 1260-1270
    Mineral and/or Locality
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