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Carpholite

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Formula:
Mn2+Al2(Si2O6)(OH)4
Colour:
Yellow
Lustre:
Silky
Hardness:
5 - 5½
Crystal System:
Orthorhombic
Name:
The name is given to the Greek words for "straw" and "stone", because of the color.
Carpholite-Ferrocarpholite Series.

Structurally related to magbasite.
Pale varieties are visually similar to davreuxite.


Classification of Carpholite

Approved, 'Grandfathered' (first described prior to 1959)
9.DB.05

9 : SILICATES (Germanates)
D : Inosilicates
B : Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals
65.1.5.1

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
16.16.5

16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn

Physical Properties of Carpholite

Silky
Colour:
Yellow
Hardness:
5 - 5½ on Mohs scale

Optical Data of Carpholite

Type:
Biaxial (-)
RI values:
nα = 1.610 nβ = 1.628 nγ = 1.630
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
Dispersion:
relatively strong

Chemical Properties of Carpholite

Formula:
Mn2+Al2(Si2O6)(OH)4
IMA Formula:
Mn2+Al2Si2O6(OH)4
Common Impurities:
Ti,Fe,V,Zn,Mg,Ca,Na,K

Crystallography of Carpholite

Crystal System:
Orthorhombic
Cell Parameters:
a = 13.83 Å, b = 20.31 Å, c = 5.13 Å
Ratio:
a:b:c = 0.681 : 1 : 0.253
Unit Cell V:
1,440.95 ų (Calculated from Unit Cell)

Type Occurrence of Carpholite

Other Language Names for Carpholite

Simplified Chinese:纤锰柱石
Traditional Chinese:纖錳柱石

Relationship of Carpholite to other Species

Other Members of this group:
Ferrocarpholite(Fe2+,Mg)Al2(Si2O6)(OH)4
Magnesiocarpholite(Mg,Fe2+)Al2(Si2O6)(OH)4
Potassiccarpholite(K,☐)(Li,Mn2+)2Al4(Si2O6)2(OH,F)8
VanadiocarpholiteMn2+V3+Al(Si2O6)(OH)4
Forms a series with:

Common Associates

Associated Minerals Based on Photo Data:
Fluorite12 photos of Carpholite associated with Fluorite on mindat.org.
Dickite2 photos of Carpholite associated with Dickite on mindat.org.
Sursassite2 photos of Carpholite associated with Sursassite on mindat.org.
Palenzonaite2 photos of Carpholite associated with Palenzonaite on mindat.org.
Smoky Quartz1 photo of Carpholite associated with Smoky Quartz on mindat.org.
Jasper1 photo of Carpholite associated with Jasper on mindat.org.
Quartz1 photo of Carpholite associated with Quartz on mindat.org.

Related Minerals - Nickel-Strunz Grouping

9.DB.05BalipholiteBaLiMg2Al3(Si2O6)2(OH)4
9.DB.05Ferrocarpholite(Fe2+,Mg)Al2(Si2O6)(OH)4
9.DB.05Magnesiocarpholite(Mg,Fe2+)Al2(Si2O6)(OH)4
9.DB.05Potassiccarpholite(K,☐)(Li,Mn2+)2Al4(Si2O6)2(OH,F)8
9.DB.05VanadiocarpholiteMn2+V3+Al(Si2O6)(OH)4
9.DB.10LorenzeniteNa2Ti2(Si2O6)O3
9.DB.15LintisiteLiNa3Ti2(Si2O6)2O2 · 2H2O
9.DB.15PunkaruaiviteLiTi2(HSi4O12)(OH)2 · H2O
9.DB.17EliseeviteLiNa1.5Ti2(H1.5Si4O12)O2 · 2H2O
9.DB.20KukisvumiteNa6ZnTi4(Si8O24)O4 · 4H2O
9.DB.20ManganokukisvumiteNa6MnTi4(Si8O24)O4 · 4H2O
9.DB.25VinogradoviteNa4Ti4(Si2O6)2[(Si,Al)4O10]O4 · (H2O,Na,K)3
9.DB.25ParavinogradoviteNa1-2(Ti,Fe3+)4(Si2O6)2(AlSi3O10)(OH)4 · H2O
9.DB.30NchwaningiteMn2+2(SiO3)(OH)2 · H2O
9.DB.35PlancheiteCu8(Si8O22)(OH)4 · H2O
9.DB.40ShattuckiteCu5(Si2O6)2(OH)2
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]
9.DB.50CapranicaiteKCaNaAl4B4Si2O18

Related Minerals - Hey's Chemical Index of Minerals Grouping

16.16.1KanonaiteMn3+Al(SiO4)O
16.16.2SpessartineMn2+3Al2(SiO4)3
16.16.3DavreuxiteMnAl6Si4O17(OH)2
16.16.4SursassiteMn2+2Al3(SiO4)(Si2O7)(OH)3
16.16.6KellyiteMn2+2Al(AlSiO5)(OH)4
16.16.7PennantiteMn2+5Al(AlSi3O10)(OH)8
16.16.8AkatoreiteMn2+9Al2Si8O24(OH)8
16.16.9Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
16.16.10Mangano-ferri-eckermannite[Na][Na2][Mn2+4(Fe3+)]Si8O22(OH)2
16.16.11Masutomilite(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2
16.16.13HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
16.16.14Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2O
16.16.15Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2O
16.16.16Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44
16.16.17ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14
16.16.18CoombsiteK(Mn,Fe,Mg)13(Si,Al)18O42(OH)14
16.16.19HenritermieriteCa3(Mn3+,Al)2(SiO4)2(OH)4
16.16.20MacfalliteCa2Mn3+3(SiO4)(Si2O7)(OH)3
16.16.21Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
16.16.22Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
16.16.23OkhotskiteCa2(Mn,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2O
16.16.24Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
16.16.25Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)

Related Minerals - Dana Grouping (8th Ed.)

65.1.5.2Ferrocarpholite(Fe2+,Mg)Al2(Si2O6)(OH)4
65.1.5.3Magnesiocarpholite(Mg,Fe2+)Al2(Si2O6)(OH)4
65.1.5.4BalipholiteBaLiMg2Al3(Si2O6)2(OH)4

Other Information

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 Carpholite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Naumova, I.S., Pobedimskaya, E.A., Belov, N.V. (1974): Crystal structure of carpholite MnAl2(Si2O6)(OH)4. Kristallografiya 19, 1155-1160 (in Russian).
Lindemann, W., Wögerbauer, R., Berger, P. (1979): Die Kristallstruktur von Karpholith (Mn0.97Mg0.08FeII0.07)(Al1.90FeIII0.01)Si2O6(OH)4. Neues Jahrbuch für Mineralogie, Monatshefte 1979, 282-287 (in German).
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.
Theye, T., Seidel, E., and Vidal, O. (1992) Carpholite, sudoite, chloritoid in low-grade high-pressure metapelites from Crete and the Peloponnese, Greece. European Journal of Mineralogy: 4: 487-507.
Theye, T. (2000) New experimental high pressure data on chloritoid and carpholite. Beiheft No. 1, European Journal of Mineralogy: 12: 212.
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 Carpholite

mindat.org URL:
https://www.mindat.org/min-909.html
Please feel free to link to this page.

Localities for Carpholite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Belgium
 
  • Liège Province
    • Stavelot Massif
Hatert, F., Blondieau, M., Puccio, S., Baijot, M. et Gustine, C. (2014) - Le gisement de manganèse de la vallée de la Lienne, Belgique. Le Règne Minéral, 117, pp. 5-28, editions du Piat.
        • Stoumont
Handbook of Mineralogy
Michel Blondiau collection
        • Werbomont
Michel Blondieau collection
  • Luxembourg Province
    • Manhay
Hatert, F., Deliens, M., Fransolet, A.-M. & van der Meersche, E. (2002): Les minéraux de Belgique. 2ème édition, Muséum des Sciences Naturelles, Bruxelles, Ed., 304 p.
    • Stavelot Massif
      • Vielsalm
Theye, Th., Fransolet A.M. (1994): "Virtually Pure Ottrelite from the Region of Ottré, Belgium", European Journal of Mineralogy, 1994, 6, 547-555
China
 
  • Jilin Province (Manchuria; Dongbei Region)
    • Yanbian Chaoxianzu Autonomous Prefecture
      • Yanji Co.
Wu Hanquan, Tang kedong, and Li Cunyou (2003): Geological Bulletin of China 22(9), 651-654.
  • Qinghai Province
    • Haibei Autonomous Prefecture
Song, S., Zhang, L., Niu, Y., Wei, C., Liou, J.G., and Shu, G. (2007): Journal of Metamorphic Geology 25(4), 495
Czech Republic (TL)
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
Letztes Min. System (1817) 10, 43
        • Krásno (Schönfeld)
Petr Pauliš (2000): Nejzajímavější mineralogická naleziště Čech, Kuttna, Kutná Hora
France
 
  • Auvergne-Rhône-Alpes
    • Rhône
      • Beaujeu
        • Les Ardillats
Favreau G., Legris J-R., Dardillac M. (1996), La Verrière (Rhône): Histoire et Minéralogie, Le Cahier des Micromonteurs, n°3, pp:3-28
Germany
 
  • Saxony-Anhalt
    • Harz
      • Wippra Metamorphic Zone
No reference listed
Greece
 
  • Crete Department (Kriti)
Eur. J. Mineral., 4: 487-507
Italy
 
  • Liguria
    • Genova Province
      • Ne
        • Graveglia Valley
XRD analysis at Euratom of Ispra (Varese)
[MinRec 32:356]
          • Reppia
Rivista Mineralogica Italiana, (4), 131
  • Piedmont
    • Verbano-Cusio-Ossola Province
      • Ossola Valley
        • Ornavasso
Mattioli, V. (1987): Minerali ossolani, 10 anni dopo: errata corrige e novità. Rivista Mineralogica Italiana, 4/1987, 195-200
Japan
 
  • Honshu Island
    • Kinki region
      • Hyogo Prefecture
        • Taka-gun
Yoshimura & Aoki (1966) Koubutsugaku Zasshi, 8, 43-48.
Kazakhstan
 
  • Karagandy Province (Qaragandy Oblysy; Karaganda Oblast')
http://geo.web.ru/druza/l-Kent.htm; Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30
Romania
 
  • Suceava Co.
    • Suceava district
      • Iacobeni (Jakobeny; Jacobeny; Jakabfalva)
http://minerals-of-the-carpathians.eu
Spain
 
  • Andalusia
    • Granada
      • Otívar
Eur. J. Mineral. , 1989, 1, pp. 139-142..
  • Catalonia
    • Tarragona
      • Baix Camp
        • Villanova d'Escornalbou
          • Escornalbou Castle
Aufschluss 1975(6), 236-237
Switzerland
 
  • Grischun (Grisons; Graubünden)
    • Engadin
      • Martina
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 163.
UK
 
  • England
    • Cornwall
      • Callington District
        • Calstock
          • Gunnislake
            • Clitters United Mines
Kingsbury, A.W.G., and Hartley, J. (1957): Mineralogical Magazine 31, 502; Ryback, G., Hart, A.D., and Stanley, C.J. (2001): Journal of the Russell Society 7(2)
        • Stoke Climsland
          • Kit Hill United Mines (incl. Kit Hill Great Consols)
Kingsbury, A.W.G., and Hartley, J. (1957): Mineralogical Magazine 31, 502; Ryback, G., Hart, A.D., and Stanley, C.J. (2001): Journal of the Russell Society 7(2)
      • St Austell District
        • St Stephen-in-Brannel
          • Foxhole
[Specimen in the Natural History Museum, London]
    • Cumbria
      • Caldbeck Fells
        • Carrock Fell
BMS Database
[Specimen in the Natural History Museum, London]
USA
 
  • Idaho
    • Boise Co.
Ream, Lanny R. 2004. Idaho Minerals, 2nd edition, Revised and Updated
[MinRec 19:332]
    • Custer Co.
R&M 70:4 pp 242-263
    • Elmore Co.
      • Glens Peak area
van Laer, The Sawtooth batholith, mindat.org
R&M 70:4 pp 242-263
Rocks & Min. 70:246
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