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Chivruaiite

A valid IMA mineral species
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07928400014971985064702.jpg
Chivruaiite, etc.

Chivruai river valley, Lovozersky District, Murmansk Oblast, Russia
06112470017087807392366.jpg
Chivruaiite, etc.

Bricco Volti - Monte Ortieul quarrying area, Montoso Quarries, Bagnolo Piemonte, Cuneo Province, Piedmont, Italy
07928400014971985064702.jpg
Chivruaiite, etc.

Chivruai river valley, Lovozersky District, Murmansk Oblast, Russia
06112470017087807392366.jpg
Chivruaiite, etc.

Bricco Volti - Monte Ortieul quarrying area, Montoso Quarries, Bagnolo Piemonte, Cuneo Province, Piedmont, Italy
07928400014971985064702.jpg
Chivruaiite, etc.

Chivruai river valley, Lovozersky District, Murmansk Oblast, Russia
06112470017087807392366.jpg
Chivruaiite, etc.

Bricco Volti - Monte Ortieul quarrying area, Montoso Quarries, Bagnolo Piemonte, Cuneo Province, Piedmont, Italy
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About ChivruaiiteHide

Formula:
Ca4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2O
Colour:
Pale pink to colourless
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
2.4
Crystal System:
Orthorhombic
Member of:
Zorite Group
Name:
For the type locality, the Chivruai River Valley, Lovozero Massif, Kola Peninsula, Russia.
The structure of Chivruaiite contains double dreier chains of (SiO4) tetrahedra, which are linked by Ti cations into a three-dimensional framework. A topologically identical framework is found in the structures of Haineaultite, Zorite, and the synthetic Zorite analogue ETS-4 (Men'shikov et al., 2006).


Unique IdentifiersHide

Mindat ID:
27495
Long-form identifier:
mindat:1:1:27495:7
GUID
(UUID V4):
33a55211-b457-408b-b99c-6576a52165cd

IMA Classification of ChivruaiiteHide

IMA status:
Approved
Approval year:
2004

Classification of ChivruaiiteHide

Strunz-mindat (2024):
9.DG.45

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
CvrIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of ChivruaiiteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Pale pink to colourless
Streak:
White
Hardness:
3 on Mohs scale
Cleavage:
Distinct/Good
on {100} and {010}
Fracture:
Step-Like
Density:
2.4 g/cm3 (Measured)    2.42 g/cm3 (Calculated)

Optical Data of ChivruaiiteHide

Type:
Biaxial (+)
RI values:
nα = 1.705 nβ = 1.627 nγ = 1.612
2V:
Measured: 35° to 45°, Calculated: 31°
Max Birefringence:
δ = 0.093
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v
Pleochroism:
Weak
Comments:
X = b
Y = a
Z = c

Z: pale-pink, X and Y: colourless

Chemistry of ChivruaiiteHide

Mindat Formula:
Ca4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2O
Elements listed:
Ca, H, Nb, O, Si, Ti - search for minerals with similar chemistry

Crystallography of ChivruaiiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cmmm
Cell Parameters:
a = 7.17 Å, b = 22.98 Å, c = 6.94 Å
Ratio:
a:b:c = 0.312 : 1 : 0.302
Unit Cell V:
1144.4 ų
Z:
1
Morphology:
Dominant faces: {100}, {010}, {001}, {101}, and {011}

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
11.6 Å(100)
6.91 Å(90)
5.23 Å(50)
3.41 Å(50)
3.35 Å(50)
3.04 Å(80)
Comments:
Format: d/Å (I/%) (hkl), from type description

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of ChivruaiiteHide

Type Locality:
ⓘ Chivruai river valley, Lovozersky District, Murmansk Oblast, Russia
General Appearance of Type Material:
elongate-prismatic crystals up to 3 mm long, as well as radiating aggregates
Place of Conservation of Type Material:
Geological and Mineralogical Museum of the Geological Institute of the Kola Science Centre of Russian Academy of Sciences, Apatity, Russia (co-type); Mineralogical Museum of St. Petersburg State University (holotype).
Geological Setting of Type Material:
Microcline vein in eudialyte-bearing lujavrite; astrophyllite-aegirine-microcline hydrothermal veins in foyaite within nepheline syenite in alkaline massifs.
Associated Minerals at Type Locality:
NatroliteMicroclineEudialyteAstrophylliteAegirine

Synonyms of ChivruaiiteHide

Other Language Names for ChivruaiiteHide

Relationship of Chivruaiite to other SpeciesHide

Member of:
Zorite Group
Other Members of this group:
Escheite Ca2NaMnTi5[Si12O34]O2(OH)3 · 12H2OOrth. mm2 : Ama2
Haineaultite(Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2OOrth. 2 2 2 : C2 2 2
ZoriteNa8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2OOrth.

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Chivruaiite associated with NatroliteNa2Al2Si3O10 · 2H2O
1 photo of Chivruaiite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

9.DG.CalcinaksiteKNaCa(Si4O10) · H2OTric. 1 : P1
9.DG.Barrydawsonite-(Y)Na1.5Y0.5CaSi3O8(OH)Mon. 2/m : P21/b
9.DG.ParatobermoriteCa4(Al0.5Si0.5)2Si4O16(OH)(H2O)2 · (Ca · 3H2O)Mon. 2/m
9.DG.AlvesiteNaKZrSi6O15 · 2H2OOrth. mmm (2/m 2/m 2/m)
9.DG.02SteedeiteNaMn2[Si3BO9](OH)2Tric. 1 : P1
9.DG.02NolzeiteNaMn2[Si3BO9](OH)2 · 2H2OTric. 1 : P1
9.DG.05BustamiteCaMn2+(Si2O6)Tric. 1 : P1
9.DG.05FerrobustamiteCaFe2+(Si2O6)Tric. 1
9.DG.05PectoliteNaCa2Si3O8(OH)Tric. 1 : P1
9.DG.05SeranditeNaMn2+2Si3O8(OH)Tric. 1 : P1
9.DG.05WollastoniteCa3(Si3O9)Tric. 1 : P1
9.DG.05Wollastonite-1ACaSiO3Tric. 1 : P1
9.DG.05TanohataiteLiMn2Si3O8(OH)Tric. 1 : P1
9.DG.05SchizoliteNaCaMnSi3O8(OH)Tric. 1 : P1
9.DG.05MurakamiiteLiCa2Si3O8(OH)Tric. 1 : P1
9.DG.05DalnegorskiteCa5Mn(Si3O9)2Tric. 1 : P1
9.DG.07CascanditeCaScSi3O8(OH)Tric. 1
9.DG.08Plombièrite[Ca4Si6O16(OH)2 · 2H2O] · (Ca · 5H2O)Orth.
9.DG.10Clinotobermorite[Ca4Si6O17 · 2H2O] · (Ca · 3H2O)Mon.
9.DG.10RiversideiteCa5(HSi3O9)2 · 2H2OOrth.
9.DG.10TobermoriteCa4Si6O17(H2O)2 · (Ca · 3H2O)Mon. 2 : P21
9.DG.12JusiteNa2Ca15Al4Si16O54 · 17H2O
9.DG.12KenotobermoriteCa4Si6O15(OH)2(H2O)2 · 3H2OMon.
9.DG.15FoshagiteCa4(Si3O9)(OH)2Tric. 1 : P1
9.DG.20JenniteCa9(Si3O9)2(OH)8 · 8H2OTric. 1 : P1
9.DG.20KameneviteK2TiSi3O9 · H2OOrth. 2 2 2 : P21 21 21
9.DG.25ParaumbiteK3Zr2H(Si3O9)2 · nH2OOrth. mm2
9.DG.25UmbiteK2(Zr,Ti)Si3O9 · H2OOrth. 2 2 2 : P21 21 21
9.DG.30SørenseniteNa4SnBe2Si6O16(OH)4Mon. 2/m : B2/b
9.DG.32Escheite Ca2NaMnTi5[Si12O34]O2(OH)3 · 12H2OOrth. mm2 : Ama2
9.DG.35XonotliteCa6(Si6O17)(OH)2Mon. 2/m : B2/m
9.DG.40HillebranditeCa2(SiO3)(OH)2Orth. mmm (2/m 2/m 2/m) : Cmcm
9.DG.45ZoriteNa8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2OOrth.
9.DG.50Haineaultite(Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2OOrth. 2 2 2 : C2 2 2
9.DG.55EpididymiteNa2Be2Si6O15 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
9.DG.60EudidymiteNa2Be2Si6O15 · H2OMon. 2/m : B2/b
9.DG.65ElpiditeNa2ZrSi6O15 · 3H2OOrth.
9.DG.65PatyniteNaKCa4[Si9O23]Tric. 1 : P1
9.DG.67WhelaniteCu2+2Ca6[Si6O17(OH)](CO3)(OH)3 · 2H2OOrth. mm2 : Pnn2
9.DG.70Fenaksite(K,Na)4(Fe,Mn)2(Si4O10)2(OH,F)Tric. 1 : P1
9.DG.70LitidioniteCuNaKSi4O10Tric. 1 : P1
9.DG.70ManaksiteKNaMnSi4O10Tric. 1 : P1
9.DG.70YusupoviteNa2Zr(Si6O15) · 2.5H2OMon. 2/m : B2/m
9.DG.70EnricofrancoiteKNaCaSi4O10Tric. 1 : P1
9.DG.75TinaksiteK2Na(Ca,Mn2+)2TiO[Si7O18(OH)]Tric.
9.DG.75TokkoiteK2Ca4[Si7O18(OH)](OH,F)Tric.
9.DG.75SenkevichiteCsKNaCa2TiO[Si7O18](OH)Tric. 1 : P1
9.DG.80CanasiteK3Na3Ca5Si12O30(OH)4Mon. m : Bm
9.DG.80FluorcanasiteK3Na3Ca5Si12O30F4 · H2OMon. m : Bm
9.DG.85MiseriteK1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2OTric.
9.DG.90FrankameniteK3Na3Ca5(Si12O30)(F,OH)4 · H2OTric. 1 : P1
9.DG.92Charoite(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2OMon. 2/m : P21/m
9.DG.95YuksporiteK4(Ca,Na)14(Sr,Ba)2(◻,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3Mon. 2/m : P21/m
9.DG.97Eveslogite(Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14Mon. 2/m : P2/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.

Internet Links for ChivruaiiteHide

References for ChivruaiiteHide

Localities for ChivruaiiteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Italy
 
  • Piedmont
    • Cuneo Province
      • Bagnolo Piemonte
Ciriotti. M.E. et al. (2021)
Ciriotti et al. (2021)
Russia
 
  • Murmansk Oblast
    • Khibiny Massif
Men'skikov (2006) +1 other reference
Men'shikov (2006)
Men'shikov (2006)
    • Lovozersky District
Men'shikov (2006)
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