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Potassiccarpholite

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About PotassiccarpholiteHide

Formula:
(K,☐)(Li,Mn2+)2Al4(Si2O6)2(OH,F)8
Colour:
White, straw-yellow
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
3.08
Crystal System:
Orthorhombic
Name:
Denotes the relation to carpholite, and the substitution of potassium for the vacancy at the A(2)site
This page provides mineralogical data about Potassiccarpholite.


Classification of PotassiccarpholiteHide

Approved
Approval Year:
2002
9.DB.05

9 : SILICATES (Germanates)
D : Inosilicates
B : Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals

Physical Properties of PotassiccarpholiteHide

Vitreous
Transparency:
Transparent
Colour:
White, straw-yellow
Streak:
white
Hardness:
Hardness Data:
Measured
Cleavage:
Perfect
parallel to [100]
Fracture:
Irregular/Uneven
Density:
3.08 g/cm3 (Measured)    3.06 g/cm3 (Calculated)

Optical Data of PotassiccarpholiteHide

Type:
Biaxial (-)
RI values:
nα = 1.578 nβ = 1.592 nγ = 1.598
2V:
Measured: 57° , Calculated: 66°
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Weak
Comments:
X pale yellow, Y=Z colorless, with X>Y,Z and X=b, Y=a, and Z=c
Comments:
measured with a Bloss spindle stage for the wavelength 590nm using a gel filter

Chemical Properties of PotassiccarpholiteHide

Formula:
(K,☐)(Li,Mn2+)2Al4(Si2O6)2(OH,F)8
IMA Formula:
K(Mn2+,Li)2Al4Si4O12(OH,F)8

Crystallography of PotassiccarpholiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Ccca
Cell Parameters:
a = 13.715 Å, b = 20.302 Å, c = 5.138 Å
Ratio:
a:b:c = 0.676 : 1 : 0.253
Unit Cell V:
1430.6 ų
Z:
4
Morphology:
acicular, elongate along [100]
Twinning:
not observed

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.705 (100)
3.819 (80)
3.433 (80)
3.048 (90)
2.744 (80)
2.613 (100)
2.050 (80)

Type Occurrence of PotassiccarpholiteHide

General Appearance of Type Material:
Irregular tufts (up to 2 mm across) of radiating acicular to fibrous crystals in miarolitic cavities.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, Ontario, Canada
Geological Setting of Type Material:
Anorogenic Tertiary granite pluton
Associated Minerals at Type Locality:

Synonyms of PotassiccarpholiteHide

Other Language Names for PotassiccarpholiteHide

Simplified Chinese:富钾纤锰柱石
Traditional Chinese:富鉀纖錳柱石

Relationship of Potassiccarpholite to other SpeciesHide

Other Members of this group:
CarpholiteMn2+Al2(Si2O6)(OH)4Orth.
Ferrocarpholite(Fe2+,Mg)Al2(Si2O6)(OH)4Orth. mmm (2/m 2/m 2/m) : Ccca
Magnesiocarpholite(Mg,Fe2+)Al2(Si2O6)(OH)4Orth.
VanadiocarpholiteMn2+V3+Al(Si2O6)(OH)4Orth. mmm (2/m 2/m 2/m) : Ccca

Common AssociatesHide

Associated Minerals Based on Photo Data:
Albite1 photo of Potassiccarpholite associated with Albite on mindat.org.
Topaz1 photo of Potassiccarpholite associated with Topaz on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.DB.05BalipholiteBaLiMg2Al3(Si2O6)2(OH)4Orth.
9.DB.05CarpholiteMn2+Al2(Si2O6)(OH)4Orth.
9.DB.05Ferrocarpholite(Fe2+,Mg)Al2(Si2O6)(OH)4Orth. mmm (2/m 2/m 2/m) : Ccca
9.DB.05Magnesiocarpholite(Mg,Fe2+)Al2(Si2O6)(OH)4Orth.
9.DB.05VanadiocarpholiteMn2+V3+Al(Si2O6)(OH)4Orth. mmm (2/m 2/m 2/m) : Ccca
9.DB.10LorenzeniteNa2Ti2(Si2O6)O3Orth. mmm (2/m 2/m 2/m) : Pbcn
9.DB.15LintisiteLiNa3Ti2(Si2O6)2O2 · 2H2OMon.
9.DB.15PunkaruaiviteLiTi2(HSi4O12)(OH)2 · H2OMon. 2/m : B2/b
9.DB.17EliseeviteLiNa1.5Ti2(H1.5Si4O12)O2 · 2H2OMon. 2/m : B2/b
9.DB.20KukisvumiteNa6ZnTi4(Si8O24)O4 · 4H2OOrth.
9.DB.20ManganokukisvumiteNa6MnTi4(Si8O24)O4 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pccn
9.DB.25VinogradoviteNa4Ti4(Si2O6)2[(Si,Al)4O10]O4 · (H2O,Na,K)3Mon. 2/m : B2/b
9.DB.25ParavinogradoviteNa1-2(Ti,Fe3+)4(Si2O6)2(AlSi3O10)(OH)4 · H2OTric. 1 : P1
9.DB.30NchwaningiteMn2+2(SiO3)(OH)2 · H2OOrth.
9.DB.35PlancheiteCu8(Si8O22)(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
9.DB.40ShattuckiteCu5(Si2O6)2(OH)2Orth. mmm (2/m 2/m 2/m)
9.DB.40UM2005-31-SiO:CuHCu11(SiO4)(OH)18 · 9H2O ?
9.DB.45Aerinite(Ca5.1Na0.5)(Fe3+,Al,Fe2+,Mg)4(Al,Mg)6[HSi12O36(OH)12][(CO3)1.2(H2O)12]Mon.
9.DB.50CapranicaiteKCaNaAl4B4Si2O18Mon. 2/m : P21/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for PotassiccarpholiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Ghose, S., Sen Gupta, P.K., Boggs, R.C., Schlemper, E.O. (1989): Crystal chemistry of a nonstoichiometric carpholite, Kx(Mn2-xLix)Al4Si4O12(OH)4F4: A chain silicate related to pyroxenes. American Mineralogist 74, 1084-1090.
Tait, K.T., Hawthorne, F.C., Grice, J.D., Jambor, J.L., and Pinch, W.W. (2004) Potassic-carpholite, a new mineral species from the Sawtooth batholith, Boise County, Idaho, U.S.A. Canadian Mineralogist 42, 121-124.
Basso, R., Carbone, C. (2010): Relationships between crystal data and crystal chemistry of carpholite-group minerals. Periodico di Mineralogia 79, 91-98.

Internet Links for PotassiccarpholiteHide

Localities for PotassiccarpholiteHide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
USA (TL)
 
  • Idaho
    • Boise Co.
Tait, K.T., Hawthorne, F.C., Grice, J.D., Jambor, J.L., and Pinch, W.W. (2004) Potassic-carpholite, a new mineral species from the Sawtooth batholith, Boise County, Idaho, U.S.A. Canadian Mineralogist 42, 121-124.
W.C. van Laer: the Sawtooth batholith, mindat 2009
William C. van Laer collection
    • Elmore Co.
      • Glens Peak area
WC van Laer, 2009
W.C. van Laer, 2009
Idaho Minerals (2004) L. Ream 2nd ed
Mineral and/or Locality  
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