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Crystal System:
Originally named for its relationship to holmquistite.
Originally reported from Tastyg Spodumene Deposit, Tuva Republic, Eastern-Siberian Region, Russia.

Investigation of the holotype material of clino-holmquistite (Ginzburg, 1965) showed it to be a mixture of two distinct amphibole compositions, tremolite and a new amphibole end-member, then named fluoro-sodic-pedrizite (Oberti et al. 2005; IMA 2004-002). The latter was subsequently renamed fluoro-pedrizite.

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Classification of Clino-holmquistiteHide


8 : Silicates

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
1 : Amphiboles - Mg-Fe-Mn-Li subgroup

Physical Properties of Clino-holmquistiteHide


Optical Data of Clino-holmquistiteHide

Biaxial (-)
RI values:
nα = 1.610 nβ = 1.627 nγ = 1.633
Measured: 55° to 61°, Calculated: 60°
Max Birefringence:
δ = 0.023
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
relatively strong

Crystallography of Clino-holmquistiteHide

Crystal System:
Cell Parameters:
a = 9.8 Å, b = 17.83 Å, c = 5.3 Å
β = 109.1°
a:b:c = 0.55 : 1 : 0.297
Unit Cell V:
875.11 ų (Calculated from Unit Cell)

Synonyms of Clino-holmquistiteHide

Other Language Names for Clino-holmquistiteHide

Related Minerals - Nickel-Strunz Grouping (8th Edition)Hide

8/.-Magnesiosadanagaite{Na}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2Mon. 2/m
8/.-UrsiliteMg4(UO2)4(Si2O5)5.5(OH)5 · 13H2OOrth.
8/.-Uvite SeriesCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)Trig. 3m : R3m
8/.-Bariumbannisterite(K,H3O)(Ba,Ca)(Mn2+,Fe2+,Mg)21(Si,Al)32O80(O,OH)16 · 4-12H2OMon.
8/.-Manganocummingtonite☐{Mn2+2}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
8/.-Chamosite-Clinochlore SeriesMon.
8/.-Celsian-Hyalophane SeriesMon.
8/.-MoronoliteKFe3+3(SO4)2(OH)6Mon. 2/m : P21/m
8/.-IMA2007-015K(NaCa)(Fe2+3Al2)(Si6Al2)O22(OH)2Mon. 2/m : B2/m

Related Minerals - Dana Grouping (8th Ed.)Hide☐{Mg2}{Mg5}(Si8O22)(OH)2Mon.☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2Mon. 2/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 Clino-holmquistiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Ginzburg, I.V. (1965) Holmquistite and its structural variety clinoholmquistite. Trudy Mineralogicheskogo Muzeya Akademii Nauk SSSR: 16: 73–89.
Litvin, A.L., Ginzburg, I.V., Egorova, L.N., Petrunina, A.A. (1975) On the crystal structure of clinoholmquistite. Konstitutsiya i Svoystva Mineralov: 9: 3–6.
Mandarino, J.A. (1998) The Second List of Additions and Corrections to the Glossary of Mineral Species (1995). The Amphibole Group. Mineralogical Record: 29: 169-174.
Oberti, R., Cámara, F., Ottolini, L. (2005) Clinoholmquistite discredited: The new amphibole end-member fluoro-sodic-pedrizite. American Mineralogist: 90: 732-736.
Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., Welch, M.D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist: 97: 2031-2048.

Internet Links for Clino-holmquistiteHide

Localities for Clino-holmquistiteHide

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.
AM 63 (1978), 1023; HB2/1 (1995); MM 61 (1997), 295
  • Tuva
Trans.Min.Mus.Acad.Sci.USSR (1965) 16, 73-80; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow Oberti, R., Cámara, F., and Ottolini, L. (2005) Clinoholmquistite discredited: the new amphibole end-member fluoro-sodic-pedrizite. American Mineralogist, 90, 732–736
  • Community of Madrid
    • Manzanares el Real
AmMin 83:167-171 (1998)
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