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Clinoholmquistite

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Formula:
☐{Li
 
2
}{Mg
 
3
Al
 
2
}(Si
 
8
O
 
22
)(OH)
 
2
System:MonoclinicColour:Blue
Lustre:VitreousHardness:5 - 6
Member of:Mg-Mn-Fe-Li Clino-Amphibole Subgroup > Amphibole Group
Name:Named for its relationship to holmquistite.


Amphibole Group. Mg-Fe-Mn-Li Clino-Amphibole Subgroup.

Originally reported from Tastyg Spodumene Deposit, Tuva Republic, Eastern-Siberian Region, Russia.

Classification of Clinoholmquistite

IMA status:Discredited 2004
Explanation of status:The approval of proposal IMA2004-002 implies the official discreditation of clinoholmquistite, as holotype material from the latter mineral was used for the description of the former, new mineral. Clinoholmquistite is now only a theoretical name in the amphibole nomenclature system.
Strunz 8th edition ID:8/F.07-70

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

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

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

Crystallography of Clinoholmquistite

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 Clinoholmquistite

Type:Biaxial (-)
RI values: nα = 1.610 nβ = 1.627 nγ = 1.633
2V:Measured: 55° to 61°, Calculated: 60°
Maximum Birefringence:δ = 0.023

Chart 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 Clinoholmquistite

Formula:
☐{Li
 
2
}{Mg
 
3
Al
 
2
}(Si
 
8
O
 
22
)(OH)
 
2
Essential elements:Al, H, Li, Mg, O, Si
All elements listed in formula:Al, H, Li, Mg, O, Si
Common Impurities:Mn,Ca,Li,Na,K

Relationship of Clinoholmquistite to other Species

Member of:Mg-Mn-Fe-Li Clino-Amphibole Subgroup > Amphibole Group
Other Members of Group:

- +
Clinoferroholmquistite
☐{Li
 
2
}{Fe
2+
3
Al
 
2
}(Si
 
8
O
 
22
)(OH,F)
 
2
Cummingtonite
☐{Mg
 
2
}{Mg
 
5
}(Si
 
8
O
 
22
)(OH)
 
2
Grunerite
☐{Fe
2+
2
}{Fe
2+
5
}(Si
 
8
O
 
22
)(OH)
 
2
Manganocummingtonite
☐{Mn
2+
2
}{Mg
 
5
}(Si
 
8
O
 
22
)(OH)
 
2
Manganogrunerite
☐{Mn
2+
2
}{Fe
2+
5
}(Si
 
8
O
 
22
)(OH)
 
2
Sodic-ferri-clinoferroholmquistite
☐{Li
 
2
}{Fe
2+
3
Fe
3+
2
}(Si
 
8
O
 
22
)(OH)
 
2
Related Minerals - Strunz Grouping):

- +
8/F.07-10Cummingtonite
☐{Mg
 
2
}{Mg
 
5
}(Si
 
8
O
 
22
)(OH)
 
2
8/F.07-30Grunerite
☐{Fe
2+
2
}{Fe
2+
5
}(Si
 
8
O
 
22
)(OH)
 
2
8/F.07-40Manganocummingtonite
☐{Mn
2+
2
}{Mg
 
5
}(Si
 
8
O
 
22
)(OH)
 
2
8/F.07-50Manganogrunerite
☐{Mn
2+
2
}{Fe
2+
5
}(Si
 
8
O
 
22
)(OH)
 
2
8/F.07-60Permanganogrunerite
☐{Mn
2+
2
}{Mn
2+
5
}(Si
 
8
O
 
22
)(OH)
 
2
8/F.07-72Fluoro-clinoholmquistite
◻[Li
 
2
][Mg
 
3
Al
 
2
][(F,OH)
 
2
|Si
 
8
O
 
22
]
8/F.07-73Fluoro-sodic-clinoholmquistite
◻[Na
 
2
][Mg
 
3
Al
 
2
][(F,OH)
 
2
|Si
 
4
O
 
11
]
8/F.07-75Clinoferroholmquistite
☐{Li
 
2
}{Fe
2+
3
Al
 
2
}(Si
 
8
O
 
22
)(OH,F)
 
2
8/F.07-80Ferri-clinoholmquistite
◻[Li
 
2
][Mg
 
3
Fe
3+
2
]Si
 
8
O
 
22
(OH)
 
2
8/F.07-85Ferri-clinoferroholmquistite
◻[Li
 
2
][Fe
2+
3
Fe
3+
2
]Si
 
8
O
 
22
(OH)
 
2
8/F.07-90Sodic-ferri-clinoferroholmquistite
☐{Li
 
2
}{Fe
2+
3
Fe
3+
2
}(Si
 
8
O
 
22
)(OH)
 
2

Other Names for Clinoholmquistite

Synonyms:
Magnesioclinoholmquistite
Other Languages:
German:Clinoholmquistit
Magnesioclinoholmquistit
Russian:Клинохолмквистит
Spanish:Clinoholmquistita
Magnesioclinoholmquistita

Other Information

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

References for Clinoholmquistite

Reference List:

- +
Mineralogical Record: 29: 169-174.

Internet Links for Clinoholmquistite

Search Engines:
  • Look for Clinoholmquistite on Google
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    • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
  • Search for - Clinoholmquistite - on e-Rocks Mineral Sales & Auctions
  • SpiriferMinerals.com - high quality low prices
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  • Fine Minerals from Weinrich Minerals, Inc.
  • Pricedownminerals.com - Reverse Auctions and Shop
  • Buy fine minerals and gemstones from Pala International
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  • Fabre Minerals - search for Clinoholmquistite specimens
  • Find Clinoholmquistite on www.crystalclassics.co.uk
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    • Localities for Clinoholmquistite

    Hide Locality List
    (TL) indicates type locality. ? 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
    AM 63 (1978), 1023; HB2/1 (1995); MM 61 (1997), 295
    Spain
     
    • Madrid
      • Sierra de Guadarrama
        • Eastern Pedriza Massif
    		AmMin 83:167-171 (1998)
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