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Penikisite

Big Photo

Rapid Creek, Dawson Mining District, Yukon Territory, Canada
© Knut Eldjarn

Show Penikisite Photos (2)
Formula:
Ba(Mg,Fe
2+
 
,Ca)
 
2
Al
 
2
[OH|PO
 
4
]
 
3
System:TriclinicColour:Blue
Hardness:4
Name:Named after Gunnar Penikis.


Kulanite-Penikisite Series.

Classification of Penikisite

IMA status:Approved
Strunz 8th edition ID:7/B.29-10
Nickel-Strunz 10th (pending) edition ID:8.BH.20

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1
Dana 8th edition ID:41.9.1.2

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)5(XO4)3Zq
Hey's CIM Ref.:19.5.11

19 : Phosphates
5 : Phosphates of Sr and Ba
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Type Occurrence of Penikisite

Type Locality:Rapid Creek, Dawson Mining District, Yukon Territory, Canada
Year of Discovery:1977

Physical Properties of Penikisite

Lustre:Vitreous
Colour:Blue
Streak:White
Hardness (Mohs):4

Crystallography of Penikisite

Crystal System:Triclinic
Cell Parameters:a = 8.99Å, b = 12.06Å, c = 4.92Å
α = 90°, β = 100.52°, γ = 90°
Ratio:a:b:c = 0.745 : 1 : 0.408
Unit Cell Volume:V 524.46 ų (Calculated from Unit Cell)

Optical Data of Penikisite

Type:Biaxial (+)
RI values: nα = 1.684 nβ = 1.688 nγ = 1.705
2V:Measured: 52° to 56°, Calculated: 54°
Maximum Birefringence:δ = 0.021

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v

Chemical Properties of Penikisite

Formula:
Ba(Mg,Fe
2+
 
,Ca)
 
2
Al
 
2
[OH|PO
 
4
]
 
3
Essential elements:Al, Ba, H, Mg, O, P
All elements listed in formula:Al, Ba, Ca, Fe, H, Mg, O, P

Relationship of Penikisite to other Species

Series:Forms a series with Kulanite (see here)
Member of Group:
Bjarebyite Group:
Related Minerals - Nickel-Strunz Grouping):

- +
8.BH.05Thadeuite
Ca(Mg,Fe
2+
 
)
 
3
[(OH,F)|PO
 
4
]
 
2
8.BH.10Durangite
NaAl[F|AsO
 
4
]
8.BH.10Isokite
CaMg[F|PO
 
4
]
8.BH.10Lacroixite
NaAl[F|PO
 
4
]
8.BH.10Maxwellite
NaFe
3+
 
[F|AsO
 
4
]
8.BH.10Panasqueiraite
CaMg[(OH,F)|PO
 
4
]
8.BH.10Tilasite
CaMg[F|AsO
 
4
]
8.BH.15Drugmanite
Pb(Fe
3+
 
,Al)
 
2
[OH|PO
 
4
]
 
2
8.BH.20Bjarebyite
(Ba,Sr)(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
Al
 
2
[OH|PO
 
4
]
 
3
8.BH.20Cirrolite
near Ca
 
3
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Kulanite
Ba(Fe
2+
 
,Mn
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
2
[OH|PO
 
4
]
 
3
8.BH.20Perloffite
Ba(Mn
2+
 
,Fe
2+
 
)
 
2
Fe
3+
2
[OH|PO
 
4
]
 
3
8.BH.20Johntomaite
BaFe
2+
2
Fe
3+
2
[OH|PO
 
4
]
 
3
8.BH.25Bertossaite
(Li,Na)
 
2
(Ca,Fe
2+
 
,Mn
2+
 
)Al
 
4
[(OH,F)|PO
 
4
]
 
4
8.BH.25Palermoite
(Li,Na)
 
2
(Sr,Ca)Al
 
4
[PO
 
4
]
 
4
(OH)
 
4
8.BH.30Carminite
PbFe
3+
2
[OH|AsO
 
4
]
 
2
8.BH.30Sewardite
CaFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.35Adelite
CaMg[AsO
 
4
](OH)
8.BH.35Arsendescloizite
PbZn[OH|AsO
 
4
]
8.BH.35Austinite
CaZn[OH|AsO
 
4
]
8.BH.35Cobaltaustinite
CaCo[OH|AsO
 
4
]
8.BH.35Conichalcite
CaCu[OH|AsO
 
4
]
8.BH.35Duftite
PbCu[OH|AsO
 
4
]
8.BH.35Gabrielsonite
PbFe[OH|AsO
 
4
]
8.BH.35Nickelaustinite
Ca(Ni,Zn)[OH|AsO
 
4
]
8.BH.35Tangeite
CaCu[OH|VO
 
4
]
8.BH.35Gottlobite
CaMg[OH|(VO
 
4
,AsO
 
4
)]
8.BH.40Čechite
Pb(Fe
2+
 
,Mn
2+
 
)[OH|VO
 
4
]
8.BH.40Descloizite
Pb(Zn,Cu)[OH|VO
 
4
]
8.BH.40Mottramite
Pb(Cu,Zn)[OH|VO
 
4
]
8.BH.40Pyrobelonite
PbMn
2+
 
[OH|VO
 
4
]
8.BH.45Bayldonite
Cu
 
3
Pb[OH|AsO
 
4
]
 
2
8.BH.45Vésigniéite
BaCu
 
3
[OH|VO
 
4
]
 
2
8.BH.50Paganoite
NiBi[O|AsO
 
4
]
8.BH.55Jagowerite
BaAl
 
2
[OH|PO
 
4
]
 
2
8.BH.60Attakolite
(Ca,Sr)Mn(Al,Fe)
 
4
[(OH)
 
4
|(SiO
 
4
,PO
 
4
)|(HPO
 
4
,PO
 
4
)
 
3
]
8.BH.65Leningradite
PbCu
 
3
[Cl|VO
 
4
]
 
2
Related Minerals - Hey's Index Grouping:

- +
19.5.1Strontiowhitlockite
Sr
 
9
Mg[PO
 
4
]
 
6
[HPO
 
4
]
19.5.2Belovite-(Ce)
NaSr
 
3
(Ce,La)[(F,OH)|(PO
 
4
)
 
3
]
19.5.3Goyazite
SrAl
 
3
[(OH)
 
5
|(PO
 
4
)
 
2
] · H
 
2
O
19.5.4Goedkenite
(Sr,Ca)
 
2
Al[OH|(PO
 
4
)
 
2
]
19.5.5Palermoite
(Li,Na)
 
2
(Sr,Ca)Al
 
4
[PO
 
4
]
 
4
(OH)
 
4
19.5.6Nabaphite
NaBaPO
 
4
·9H
 
2
O
19.5.7Olgite
Ba(NaSr)
 
2
Na[PO
 
4
]
 
2
19.5.8Nastrophite
Na(Sr,Ba)PO
 
4
·9H
 
2
O
19.5.9Jagowerite
BaAl
 
2
[OH|PO
 
4
]
 
2
19.5.10Gorceixite
BaAl
 
3
[(OH)
 
5
|(PO
 
4
)
 
2
] · H
 
2
O
19.5.12Curetonite
Ba
 
4
Al
 
3
Ti(PO
 
4
)
 
4
(O,OH)
 
6
19.5.13Bjarebyite
(Ba,Sr)(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
Al
 
2
[OH|PO
 
4
]
 
3
19.5.14Kulanite
Ba(Fe
2+
 
,Mn
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
2
[OH|PO
 
4
]
 
3
19.5.15Perloffite
Ba(Mn
2+
 
,Fe
2+
 
)
 
2
Fe
3+
2
[OH|PO
 
4
]
 
3

Other Names for Penikisite

Synonyms:
IMA1976-023
Other Languages:
German:Penikisit
Spanish:Penikisita

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 Penikisite

Reference List:American Mineralogist (1979): 64: 657.

Mineralogical Record (1992): 23(4): 25.

Internet Links for Penikisite

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  • Raman and XRD data at RRUFF project
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    Localities for Penikisite

    (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
    		MinRec 23:4-47
    [Can.Min.(1977) 15, 393-395; Mineralogical Record Vol 23 No.4 pp 25]
      • Mayo Mining District
    		M. Mauthner (collection)
    Mineral and/or Locality
    Google
     
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