Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Clino-holmquistite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
☐{Li2}{Mg3Al2}(Si8O22)(OH)2
The clino-holmquistite group minerals are monoclinic lithium amphiboles defined with:
A(Na+K+2Ca)< 0.5 apfu,
CLi < 0,5 apfu

Clino-holmquistite is defined with
C2+ position: Mg dominant
C3+ position: Al dominant
W position: (OH) dominant
System:
Monoclinic
Colour:
Blue
Lustre:
Vitreous
Hardness:
5 - 6
Name:
Named for its relationship to holmquistite.
Originally reported from Tastyg Spodumene Deposit, Tuva Republic, Eastern-Siberian Region, Russia.

Classification of Clino-holmquistite

Discredited
8/F.07-70

8 : Silicates
F : Inosilicates (chain and band) double chains [Si2O6]4-
07 : Amphibole group, Magnesiocummingtonite - Ferroclinoholmquistite series
66.1.1.6

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
1 : Amphiboles - Mg-Fe-Mn-Li subgroup
mindat.org URL:
http://www.mindat.org/min-6881.html
Please feel free to link to this page.

Physical Properties of Clino-holmquistite

Vitreous
Colour:
Blue
Streak:
nd.
Hardness (Mohs):
5 - 6
Cleavage:
Perfect
on {110}

Crystallography of Clino-holmquistite

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

Optical Data of Clino-holmquistite

Type:
Biaxial (-)
RI values:
nα = 1.610 nβ = 1.627 nγ = 1.633
2V:
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:
Moderate
Dispersion:
relatively strong

Chemical Properties of Clino-holmquistite

Formula:
☐{Li2}{Mg3Al2}(Si8O22)(OH)2

The clino-holmquistite group minerals are monoclinic lithium amphiboles defined with:
A(Na+K+2Ca)< 0.5 apfu,
CLi < 0,5 apfu

Clino-holmquistite is defined with
C2+ position: Mg dominant
C3+ position: Al dominant
W position: (OH) dominant
All elements listed in formula:
Common Impurities:
Mn,Ca,Li,Na,K

Relationship of Clino-holmquistite to other Species

Other Members of Group:
Clino-ferri-fluoro-holmquistite☐{Li2}{Mg3Fe23+}(Si8O22)F2
Clino-ferri-holmquistite◻{Li2}{Mg3Fe23+}(Si8O22)(OH)2
Clino-ferro-ferri-fluoro-holmquistite☐{Li2}{Fe32+Fe23+}(Si8O22)F2
Clino-ferro-ferri-holmquistite◻{Li2}{Fe32+Fe23+}(Si8O22)(OH)2
Clino-ferro-fluoro-holmquistite☐{Li2}{Fe32+Al2}(Si8O22)F2
Clino-fluoro-holmquistite◻{Li2}{Mg3Al2}(Si8O22)F2
8/F.07-10Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2
8/F.07-30Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
8/F.07-40Manganocummingtonite☐{Mn22+}{Mg5}(Si8O22)(OH)2
8/F.07-50Manganogrunerite☐{Mn22+}{Fe52+}(Si8O22)(OH)2
8/F.07-60Permanganogrunerite☐{Mn22+}{Mn52+}(Si8O22)(OH)2
8/F.07-72Clino-fluoro-holmquistite◻{Li2}{Mg3Al2}(Si8O22)F2
8/F.07-73Clino-sodic-fluoro-holmquistite{Na}{Li2}{Mg4Al}(Si8O22)F2
8/F.07-75Clino-holmquistite Root Name☐{Li2}{Z32+Z23+}(Si8O22)(OH,F,Cl)2
8/F.07-80Clino-ferri-holmquistite◻{Li2}{Mg3Fe23+}(Si8O22)(OH)2
8/F.07-85Clino-ferro-ferri-holmquistite◻{Li2}{Fe32+Fe23+}(Si8O22)(OH)2
8/F.07-90Sodic-ferri-clinoferroholmquistiteNa0.5{Li2}{Fe32+Fe23+}(Si8O22)(OH)2

Other Names for Clino-holmquistite

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 Clino-holmquistite

Reference List:
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-holmquistite

Localities for Clino-holmquistite

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.
Russia
 
  • Eastern-Siberian Region
    • Tuva Republic
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
AM 63 (1978), 1023; HB2/1 (1995); MM 61 (1997), 295
Spain
 
  • Madrid
    • Manzanares el Real
AmMin 83:167-171 (1998)
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2016, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: August 26, 2016 21:01:05 Page generated: July 2, 2016 12:54:07
Go to top of page