Calzirtite
A valid IMA mineral species
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About Calzirtite
Formula:
Ca2Zr5Ti2O16
formerly given as: CaZr3TiO9
Colour:
Dark brown, nearly black
Lustre:
Adamantine, Sub-Metallic
Hardness:
6 - 7
Specific Gravity:
4.90 - 5.01
Crystal System:
Tetragonal
Member of:
Name:
Named in allusion to its composition, containing CALcium, ZIRconium and TItanium.
This page provides mineralogical data about Calzirtite.
Unique Identifiers
Mindat ID:
871
Long-form identifier:
mindat:1:1:871:6
GUID
(UUID V4):
(UUID V4):
e05d5205-72e7-4b35-ba39-9edbad499f0d
IMA Classification of Calzirtite
Approved
First published:
1961
Classification of Calzirtite
4.DL.10
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
L : With large (+- medium-sized) cations; fluorite-type structures
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
L : With large (+- medium-sized) cations; fluorite-type structures
8.7.4.1
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
7 : Miscellaneous
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
7 : Miscellaneous
7.10.6
7 : Oxides and Hydroxides
10 : Oxides of Zr and Th
7 : Oxides and Hydroxides
10 : Oxides of Zr and Th
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Caz | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Calzirtite
Adamantine, Sub-Metallic
Transparency:
Transparent
Colour:
Dark brown, nearly black
Streak:
Brown
Hardness:
6 - 7 on Mohs scale
Hardness:
VHN100=625 - 1035 - Vickers
Comment:
Varies with direction
Tenacity:
Brittle
Parting:
Two partings at ∼80◦
Density:
4.90 - 5.01 g/cm3 (Measured) 5.15 g/cm3 (Calculated)
Optical Data of Calzirtite
Type:
Uniaxial (+)
RI values:
nω = 2.190 - 2.270 nε = 2.260 - 2.360
Max Birefringence:
δ = 0.070
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Anisotropism:
pronounced
Bireflectance:
Distinct in immersion, not observed in air
Colour in reflected light:
Light gray
Internal Reflections:
Strong, reddish brown
Pleochroism:
Non-pleochroic
Chemistry of Calzirtite
Mindat Formula:
Ca2Zr5Ti2O16
formerly given as: CaZr3TiO9
formerly given as: CaZr3TiO9
Elements listed:
Chemical Analysis
Oxide wt%:
1 | |
---|---|
ZrO2 | 70.64 % |
TiO2 | 16.55 % |
HfO2 | 1.10 % |
CaO | 12.61 % |
FeO | 0.20 % |
Al2O3 | 0.11 % |
Total: | 101.21 % |
Empirical formulas:
Sample ID | Empirical Formula |
---|---|
1 | Ca1.99(Zr4.95,Hf0.05)5.00 (Ti1.84,Zr0.13,Fe0.03,Al0.02)2.02 O16 |
Sample references:
ID | Locality | Reference | Notes |
---|---|---|---|
1 | Gabbro Quarry, Radau valley, Bad Harzburg, Goslar District, Lower Saxony, Germany | Polished grain mount. Fully calibrated quantitative analysis. Average composition from 50 analyses on 6 grains. |
Crystallography of Calzirtite
Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I41/acd
Setting:
I41/acd
Cell Parameters:
a = 15.094 Å, c = 10.043 Å
Ratio:
a:c = 1 : 0.665
Unit Cell V:
2,288.08 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Prismatic, bipyramidal.
Twinning:
Trillings
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0001034 | Calzirtite | Sinclair W, Eggleton R A, McLaughlin G M (1986) Structure refinement of calzirtite from Jacupiranga, Brazil American Mineralogist 71 815-818 | 1986 | 0 | 293 | ||
0019376 | Calzirtite | Rossell H J (1982) Calzirtite - A fluorite-related superstructure Acta Crystallographica B38 593-595 | 1982 | synthetic | 0 | 293 | |
0019484 | Calzirtite | Rastsvetaeva R K, Pushcharovskii D Y, Spiridonov E M, Gekimyants V M (1995) Crystal structure of ordered calzirtite Ca2Zr5Ti2O16 magnetite deposit, Russia Crystallography Reports 40 746-748 | 1995 | Zelenets mine of the South Ural massif's Kusa titanium- | 0 | 293 | |
0019377 | Calzirtite | Callegari A, Mazzi F, Ungaretti P (1997) The crystal structure of orthorhombic calzirtite from Val Malenco (Italy) Neues Jahrbuch fur Mineralogie, Monatshefte 1997 467-480 | 1997 | Rocca Castellaccio, Val Malenco, Sondrio, Italy | 0 | 293 | |
0019378 | Calzirtite | Callegari A, Mazzi F, Ungaretti P (1997) The crystal structure of orthorhombic calzirtite from Val Malenco (Italy) Neues Jahrbuch fur Mineralogie, Monatshefte 1997 467-480 | 1997 | Rocca Castellaccio, Val Malenco, Sondrio, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.945 Å | (100) |
1.801 Å | (100) |
1.537 Å | (90) |
1.170 Å | (70) |
2.552 Å | (60) |
0.981 Å | (60) |
0.871 Å | (60) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
26 : Hadean detrital minerals | |
Stage 4b: Highly evolved igneous rocks | >3.0 |
35 : Ultra-alkali and agpaitic igneous rocks | |
36 : Carbonatites, kimberlites, and related igneous rocks |
Type Occurrence of Calzirtite
General Appearance of Type Material:
Tabular concretions 3x4x1 mm in size, composed of complex trillings. Single crystals are tetragonal, prismatic, bipyramidal.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 61743, 62363.
Geological Setting of Type Material:
In metasomatic calcite forsterite-magnetite rocks of an alkalic ultrabasic massif.
Associated Minerals at Type Locality:
Reference:
Zdorik, T.B., Sidorenko, G.A., Bykova, A.V. (1961) A new titanozirconate of calcium-calzirtite. Doklady Akademii Nauk SSSR: 137: 681-684.
Other Language Names for Calzirtite
Relationship of Calzirtite to other Species
Member of:
Other Members of this group:
Hiärneite | Ca2Zr4Mn3+SbTiO16 | Tet. 4/mmm (4/m 2/m 2/m) : I41/acd |
Tazheranite | (Zr,Ti,Ca)(O,◻)2 | Iso. m3m (4/m 3 2/m) |
Common Associates
Associated Minerals Based on Photo Data:
5 photos of Calzirtite associated with Spinel | MgAl2O4 |
3 photos of Calzirtite associated with Zirconolite | CaZrTi2O7 |
2 photos of Calzirtite associated with Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
2 photos of Calzirtite associated with Zircon | Zr(SiO4) |
1 photo of Calzirtite associated with Calcite | CaCO3 |
1 photo of Calzirtite associated with Forsterite | Mg2SiO4 |
1 photo of Calzirtite associated with Phlogopite | KMg3(AlSi3O10)(OH)2 |
Related Minerals - Strunz-mindat Grouping
4.DL.05 | Cerianite-(Ce) | (Ce4+,Th)O2 |
4.DL.05 | Thorianite | ThO2 |
4.DL.05 | Uraninite | UO2 |
4.DL.05 | Zirkelite | (Ti,Ca,Zr)O2-x |
4.DL.05 | Aeschynite Group | AD2O6 |
4.DL.10 | Tazheranite | (Zr,Ti,Ca)(O,◻)2 |
4.DL.10 | Hiärneite | Ca2Zr4Mn3+SbTiO16 |
4.DL.15 | Vorlanite | Ca(U6+)O4 |
Fluorescence of Calzirtite
Does not fluoresce
Other Information
Notes:
Partly soluble when heated in concentrated H2SO4, H3PO4, or HCl.
Wavy red cathodoluminescence
Wavy red cathodoluminescence
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 Calzirtite
mindat.org URL:
https://www.mindat.org/min-871.html
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References for Calzirtite
Localities for Calzirtite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
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Gornoozerskii carbonatite complex, Sakha, Russia