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Arrojadite-(BaFe)

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Groppera Alp (Scalcoggia Valley-Groppera Valley), San Giacomo Valley, Madesimo, Spluga Valley, Sondrio Province, Lombardy, Italy




Formula:
{Ba◻}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
System:MonoclinicLustre:
Member of:Arrojadite Group
Name:For Miguel Arrojado Lisbôa, Brazilian geologist and Redefinition after the new arrojadite nomenclature (CNMMN 05-D, October 2005)


Arrojadite Group

Classification of Arrojadite-(BaFe)

IMA status:Approved 1994
Explanation of status:CNMMN redefinition 05-D, October 2005
Strunz 8th edition ID:7/B.20-25
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-(BaFe)

Type Locality:Groppera Alp (Scalcoggia Valley-Groppera Valley), San Giacomo Valley, Madesimo, Spluga Valley, Sondrio Province, Lombardy, Italy

Crystallography of Arrojadite-(BaFe)

Crystal System:Monoclinic

Optical Data of Arrojadite-(BaFe)

Type:Biaxial (+/-)
Dispersion:relatively strong

Chemical Properties of Arrojadite-(BaFe)

Formula:
{Ba◻}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
Essential elements:Al, Ba, Ca, Fe, H, Na, O, P
All elements listed in formula:Al, Ba, Ca, Fe, H, Na, O, P

Relationship of Arrojadite-(BaFe) to other Species

Member of:Arrojadite Group
Other Members of Group:

- +
Arrojadite-(BaNa)
{Ba◻}{Na
 
2
}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
Arrojadite-(KFe)
{KNa}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
Arrojadite-(KFeNa)
{KNa}{Fe
2+
 
◻}{Ca}{Na
 
3
}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
Arrojadite-(KNa)
{KNa}{Na
 
2
}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
Arrojadite-(NaFe)
{Na
 
2
}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
Arrojadite-(PbFe)
{Pb◻}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
Arrojadite-(SrFe)
{Sr◻}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
Dickinsonite-(KMnNa)
{KNa}{Mn
2+
 
◻}{Ca}{Na
 
3
}{Mn
2+
13
}{Al}(PO
 
4
)
 
12
(OH)
 
2
Ferri-arrojadite-(BaNa)
{Ba◻}{Na
 
2
}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Fe
3+
 
}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
Fluorarrojadite-(BaFe)
{Ba◻}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)F
 
2
Fluorarrojadite-(KNa)
{KNa}{Na
 
2
}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)F
 
2
Fluorarrojadite-(NaFe)
{Na
 
2
}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)F
 
2
Related Minerals - Nickel-Strunz Grouping):

- +
8.BF.05Arrojadite-(KFe)
{KNa}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
8.BF.05Dickinsonite-(KMnNa)
{KNa}{Mn
2+
 
◻}{Ca}{Na
 
3
}{Mn
2+
13
}{Al}(PO
 
4
)
 
12
(OH)
 
2
8.BF.05Arrojadite-(SrFe)
{Sr◻}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
8.BF.05Arrojadite-(KNa)
{KNa}{Na
 
2
}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
8.BF.05Arrojadite-(PbFe)
{Pb◻}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
8.BF.05Fluorarrojadite-(BaFe)
{Ba◻}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)F
 
2
8.BF.05Arrojadite-(NaFe)
{Na
 
2
}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
8.BF.05Arrojadite-(BaNa)
{Ba◻}{Na
 
2
}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)(OH)
 
2
8.BF.05Fluorarrojadite-(KNa)
{KNa}{Na
 
2
}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)F
 
2
8.BF.05Fluorarrojadite-(NaFe)
{Na
 
2
}{Fe
2+
 
◻}{Ca}{Na
 
2
◻}{Fe
2+
13
}{Al}(PO
 
4
)
 
11
(HPO
 
4
)F
 
2
8.BF.10Samuelsonite
(Ca,Ba)Ca
 
8
Fe
2+
2
Mn
2+
2
Al
 
2
(PO
 
4
)
 
10
(OH)
 
2
8.BF.15Griphite
Na
 
4
Li
 
2
Ca
 
6
(Mn
2+
 
,Fe
2+
 
,Mg)
 
19
Al
 
8
(PO
 
4
)
 
24
(F,OH)
 
8
8.BF.20Nabiasite
BaMn
2+
9
(VO
 
4
,AsO
 
4
)
 
6
(OH)
 
2

Other Names for Arrojadite-(BaFe)

Synonyms:
IMA1994-033Sigismundite
Other Languages:
German:Sigismundit
Russian:Арроядит-(BaFe)
Сигизмундит
Spanish:Sigismundita

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-(BaFe)

Reference List:

- +
Demartin, F., Gramaccioli, C.M., Pilati, T., Sciesa, E. (1996): Sigismundite, (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(OH)2(PO4)12, a new Ba-rich member of the arrojadite group from Spluga Valley, Italy. Canadian Mineralogist, 34, 827-834.

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-(BaFe)

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    • Localities for Arrojadite-(BaFe)

    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.
    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.
    Canada
     
    • Yukon Territory
      • Dawson Mining District
    		Anatoly Kasatkin http://www.mindat.org/forum.php?read,7,181358,181518#msg-181518
    Germany
     
    • Bavaria
      • Upper Palatinate
        • Oberpfälzer Wald
          • Vohenstrauß
            • Waidhaus
              • Hagendorf
    		Mücke, A. & Keck, E. (2011): Karbonate aus dem Pegmatit von Hagendorf-Süd/Opf.: Zusammensetzung, Verbreitung und begleitende Phosphat-Mineralien (Apatit, Hagendorfit und Eosphorit-Gruppe) - darunter einige Neufunde (Triplit, Mineralien der Arrojadit-Dickinsonit Reihe, Goyazit und Variscit). Aufschluss 62, 87-117.
    Italy
     
    • Lombardy
      • Sondrio Province
        • Spluga Valley
          • Madesimo
            • San Giacomo Valley
    		Demartin, F., Gramaccioli, C.M., Pilati, T., Sciesa, E. (1996): Sigismundite, (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(OH)2(PO4)12, a new Ba-rich member of the arrojadite group from Spluga Valley, Italy. Canadian Mineralogist, 34, 827-834.
    USA
     
    • South Dakota
      • Pennington Co.
        • Keystone District
          • Glendale
    		Loomis, T (2011), "News from the Black Hills, South Dakota", Mineral News, in press; Loomis, T (2011), "News from the Black Hills, South Dakota", Mineral News, in press
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