Penikisite (original) (raw)
A valid IMA mineral species
About PenikisiteHide
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Formula:
Ba(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3
Crystal System:
Monoclinic
Name:
After Gunar Penikis (1936-1979), geophysicist and prospector of Ross River, Yukon Territory, one of the early explorers (1974-1975) in partnership with A. Kulan of the Rapid Creek area localities. It is pronounced PĔNĪ•KĬSAIT.
It has the same general appearance as kulanite and both species can be found in the same crystal. The penikisite zones are generally near the edges of mixed kulanite-penikisite crystals. These zones do not follow the crystal outlines. The penikisite zones are paler and the kulanite zones are darker.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:3148:2
60723637-19c0-4d47-8b97-e8043255c7e8
IMA Classification of PenikisiteHide
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IMA Formula:
BaMg2Al2(PO4)3(OH)3
Type description reference:
Classification of PenikisiteHide
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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
41.9.1.2
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)5(XO4)3Zq
19.5.11
19 : Phosphates
5 : Phosphates of Sr and Ba
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Pks | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of PenikisiteHide
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Transparency:
Transparent, Translucent
Streak:
Very pale green to white
Cleavage:
Distinct/Good
Two fair to good cleavages {O10} and {100}
Density:
3.79(2) g/cm3 (Measured) 3.82 g/cm3 (Calculated)
Comment:
Measured with a Berman balance
Optical Data of PenikisiteHide
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RI values:
_n_α = 1.684(2) _n_β = 1.688(2) _n_γ = 1.705(2)
2V:
Measured: 52° to 56°, Calculated: 54°
δ = 0.021
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
very strong asymmetrical dispersion with dispersion of the optic axes r>>y.
Optical Extinction:
X ~ Y > Z
Comments:
X grass-green, Y blue-green, Z pale pink
Comments:
b~Y and c:Z=-6°, although b:Y ranges from 0° to 19°
Chemistry of PenikisiteHide
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Mindat Formula:
Ba(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3
Crystallography of PenikisiteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 8.9577(4) Å, b = 12.0150(5) Å, c = 4.9070(2) Å
β = 100.505(2)°, γ = °
Ratio:
a:b:c = 0.746 : 1 : 0.408
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0019754 | Penikisite | Bowman M G, Downs R T, Yang H (2013) Penikisite, BaMg2Al2(PO4)3(OH)3, isostructural with bjarebyite Acta Crystallographica E69 i4-i5 |  |
2013 | Mayo Mining District, Yukon Territory, Canada | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.81 Å | (60) |
| 3.094 Å | (100) |
| 3.028 Å | (60) |
| 2.915 Å | (80) |
| 2.684 Å | (60) |
| 2.6494 Å | (70) |
Geological EnvironmentHide
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Type Occurrence of PenikisiteHide
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General Appearance of Type Material:
The same as kulanite. Well formed blue to green crystals.
Place of Conservation of Type Material:
The Royal Ontario Museum, Toronto, Ontario, Canada (ROM No. M34172).
Associated Minerals at Type Locality:
Reference:
Mandarino, J.A., Sturman, B.D., Corlett, M.I. (1977) Penikisite, the magnesium analogue of kulanite, from the Yukon Territory, Canada. The Canadian Mineralogist: 15: 393-395.
Synonyms of PenikisiteHide
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Other Language Names for PenikisiteHide
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Relationship of Penikisite to other SpeciesHide
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Other Members of this group:
Common AssociatesHide
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Associated Minerals Based on Photo Data:
| 2 photos of Penikisite associated with Kulanite | Ba(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3 |
|---|
Related Minerals - Strunz-mindat GroupingHide
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| 8.BH. | Crimsonite | PbFe3+2(PO4)2(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) : C c c m |
|---|---|---|---|
| 8.BH. | Reznitskyite | CaMg(VO4)F | Mon. 2/m : _B_2/b |
| 8.BH. | Cuprozheshengite | Pb4CuZn2(AsO4)2(PO4)2(OH)2 | Tric. 1 : _P_1 |
| 8.BH. | Zheshengite | Pb4ZnZn2(AsO4)2(PO4)2(OH)2 | Tric. 1 : _P_1 |
| 8.BH. | Peterchinite | Zn3Zn2(OH)6As[O3(OH)3] | Mon. 2/m : _B_2/m |
| 8.BH.05 | Thadeuite | Ca(Mg,Fe2+)3(PO4)2(OH,F)2 | Orth. 222 : _C_2221 |
| 8.BH.10 | Durangite | NaAl(AsO4)F | Mon. 2/m : _B_2/b |
| 8.BH.10 | Isokite | CaMg(PO4)F | Mon. 2/m : _B_2/b |
| 8.BH.10 | Lacroixite | NaAl(PO4)F | Mon. 2/m : _B_2/b |
| 8.BH.10 | Maxwellite | NaFe3+(AsO4)F | Mon. 2/m : _P_2/m |
| 8.BH.10 | Panasqueiraite | CaMg(PO4)(OH,F) | Mon. |
| 8.BH.10 | Kononovite | NaMg(SO4)F | Mon. 2/m : _B_2/b |
| 8.BH.10 | Arsenatrotitanite | NaTi(AsO4)O | Mon. 2/m : _B_2/b |
| 8.BH.15 | Drugmanite | Pb2(Fe3+,Al)(PO4)(PO3OH)(OH)2 | Mon. 2/m : _P_21/b |
| 8.BH.20 | Bjarebyite | (Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3 | Mon. 2/m : _P_21/m |
| 8.BH.20 | Cirrolite | Ca3Al2(PO4)3(OH)3 (?) | |
| 8.BH.20 | Kulanite | Ba(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3 | Mon. 2/m : _P_21/m |
| 8.BH.20 | Perloffite | Ba(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3 | Mon. 2/m : _P_21/m |
| 8.BH.20 | Johntomaite | BaFe2+2Fe3+2(PO4)3(OH)3 | Mon. 2/m : _P_21/m |
| 8.BH.20 | Bjarebyite Group | ||
| 8.BH.20 | Strontioperloffite | SrMn2+2Fe3+2(PO4)3(OH)3 | Mon. 2/m : _P_21/m |
| 8.BH.20 | Plumboperloffite | PbMn2+2Fe3+2(PO4)3(OH)3 | Mon. 2/m : _P_21/m |
| 8.BH.20 | Nigelcookite | PbFe2+2V3+2(PO4)3(OH)3 | Mon. 2/m : _P_21/m |
| 8.BH.20 | Plumbojohntomaite | PbFe2+2Fe3+2(PO4)3(OH)3 | Mon. 2/m : _P_21/m |
| 8.BH.25 | Bertossaite | (Li,Na)2(Ca,Fe2+,Mn2+)Al4(PO4)4(OH,F)4 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 8.BH.25 | Palermoite | (Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 8.BH.25 | Natropalermoite | Na2SrAl4(PO4)4(OH)4 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 8.BH.30 | Carminite | PbFe3+2(AsO4)2(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) : C c c m |
| 8.BH.30 | Sewardite | CaFe3+2(AsO4)2(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) : C c c m |
| 8.BH.35 | Adelite | CaMg(AsO4)(OH) | Orth. 222 : _P_212121 |
| 8.BH.35 | Arsendescloizite | PbZn(AsO4)(OH) | Orth. 222 : _P_212121 |
| 8.BH.35 | Austinite | CaZn(AsO4)(OH) | Orth. 222 : _P_212121 |
| 8.BH.35 | Cobaltaustinite | CaCo(AsO4)(OH) | Orth. 222 : _P_212121 |
| 8.BH.35 | Conichalcite | CaCu(AsO4)(OH) | Orth. 222 : _P_212121 |
| 8.BH.35 | Duftite | PbCu(AsO4)(OH) | Orth. 222 : _P_212121 |
| 8.BH.35 | Gabrielsonite | PbFe3+(As3+O3)O | Orth. m _m_2 : P m _c_21 |
| 8.BH.35 | Nickelaustinite | CaNi(AsO4)(OH) | Orth. 222 : _P_212121 |
| 8.BH.35 | Tangeite | CaCu(VO4)(OH) | Orth. 222 : _P_212121 |
| 8.BH.35 | Duftite-alpha | PbCu(AsO4)(OH) | |
| 8.BH.35 | Gottlobite | CaMg(VO4)(OH) | Orth. 222 : _P_212121 |
| 8.BH.35 | Hermannroseite | CaCu(PO4)(OH) | Orth. 222 : _P_212121 |
| 8.BH.40 | Čechite | PbFe2+(VO4)(OH) | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 8.BH.40 | Descloizite | PbZn(VO4)(OH) | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 8.BH.40 | Mottramite | PbCu(VO4)(OH) | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 8.BH.40 | Pyrobelonite | PbMn2+(VO4)(OH) | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 8.BH.40 | Khorixasite | (Bi0.67◻0.33)Cu(VO4)(OH) | Mon. 2/m : _P_2/m |
| 8.BH.45 | Bayldonite | PbCu3(AsO4)2(OH)2 | Mon. 2/m : _B_2/b |
| 8.BH.45 | Vésigniéite | BaCu3(VO4)2(OH)2 | Mon. 2/m : _B_2/m |
| 8.BH.50 | Paganoite | NiBi(AsO4)O | Tric. 1 : _P_1 |
| 8.BH.55 | Harrisonite | Ca(Fe2+,Mg)6(PO4)2(SiO4)2 | Trig. 3_m_ _(_32/m ) : R_3_m |
| 8.BH.55 | Jagowerite | BaAl2(PO4)2(OH)2 | Tric. |
| 8.BH.60 | Attakolite | CaMn2+Al4(SiO3OH)(PO4)3(OH)4 | Mon. 2/m : _B_2/m |
| 8.BH.65 | Leningradite | PbCu3(VO4)2Cl | Orth. m m m _(_2/_m_2/_m_2/m ) : I b a m |
| 8.BH.70 | Katiarsite | KTiO(AsO4) | Orth. m _m_2 : P n _a_21 |
| 8.BH.70 | Yurgensonite | K2SnTiO2(AsO4)2 | Orth. m _m_2 : P n _a_21 |
| 8.BH.75 | Melanarsite | K3Cu7Fe3+O4(AsO4)4 | Mon. 2/m : _B_2/b |
| 8.BH.80 | Moraskoite | Na2Mg(PO4)F | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c n |
| 8.BH.80 | Evseevite | Na2Mg(AsO4)F | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c n |
| 8.BH.85 | Piccoliite | NaCaMn3+2(AsO4)2O(OH) | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c m |
Fluorescence of PenikisiteHide
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Not fluorescent under short-wave and long-wave ultraviolet light
Other InformationHide
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Thermal Behaviour:
A weight loss of 3.88% and an endothermic peak at 71O C.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for PenikisiteHide
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References for PenikisiteHide
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Localities for PenikisiteHide
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This 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.
Locality ListHide
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