Paqueite (original) (raw)
A valid IMA mineral species
Formula:
Ca3TiSi2(Al,Ti,Si)3O14
End-member formula: Ca3TiSi2(Al2Ti)O14
Name:
in honour of Julie M. Paque (1958 - ), cosmochemist at the California Institute of Technology, USA.
The Al analogue of qeltite.
A new Ti-rich silicate in Ca-Al-rich inclusion (CAI). Known as synthetic phase. Similar phase is known from Esebi C2 chondrite.
Chemistry very similar to that of hutcheonite. Similar element combination is also found in grossmanite.
Presumably a product of late-stage crystallization.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:43931:4
1b2c34b2-f2f7-4886-878e-9ced0f2aaae3
IMA Classification of PaqueiteHide
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Classification of PaqueiteHide
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9.HA.42
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Paq | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Chemistry of PaqueiteHide
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Mindat Formula:
Ca3TiSi2(Al,Ti,Si)3O14
End-member formula: Ca3TiSi2(Al2Ti)O14
Common Impurities:
Na,V,(Sc,Mg)
Crystallography of PaqueiteHide
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Class (H-M):
32 - Trapezohedral
Cell Parameters:
a = 7.943 Å
Unit Cell V:
269.37 ų (Calculated from Unit Cell)
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.879 Å | (20) |
| 3.093 Å | (100) |
| 2.821 Å | (50) |
| 2.821 Å | (68) |
| 2.600 Å | (21) |
| 2.300 Å | (43) |
| 1.908 Å | (17) |
| 1.789 Å | (28) |
Comments:
From Type Description.
Geological EnvironmentHide
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Type Occurrence of PaqueiteHide
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General Appearance of Type Material:
micron-sized crystals, within Al-rich melilite
Place of Conservation of Type Material:
Type material is deposited in the collections of the Smithsonian Institution’s National Museum of Natural History, Washington DC, USA, registration number USNM 7617
Associated Minerals at Type Locality:
Synonyms of PaqueiteHide
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Related Minerals - Strunz-mindat GroupingHide
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| 9.HA. | Shinichengite | Ca5[BSi2O7(OH)2]2 · 6H2O | Tric. 1 : _P_1 |
|---|---|---|---|
| 9.HA. | Kalyuzhnyite-(Ce) | NaKCaSrCeTi(Si8O21)OF(H2O)3 | Mon. 2/m : _P_2/b |
| 9.HA. | Moragite | Ca3TiSi2(Al2Si)O14 | Trig. 32 : _P_321 |
| 9.HA.05 | Ertixiite | Na2Si4O9 | Iso. |
| 9.HA.10 | Kenyaite | Na2Si22O41(OH)8 · 6H2O | Mon. |
| 9.HA.20 | Wawayandaite | Ca6Mn2BBe9Si6O23(OH,Cl)15 | Mon. |
| 9.HA.25 | Magbasite | KBaFe3+Mg7Si8O22(OH)2F6 | Orth. m m m _(_2/_m_2/_m_2/m ) : C m m a |
| 9.HA.35 | Demagistrisite | BaCa2Mn3+4(Si3O10)(Si2O7)(OH)4 · 3H2O | Orth. m _m_2 : A m _m_2 |
| 9.HA.37 | Donwilhelmsite | CaAl4Si2O11 | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_63/m m c |
| 9.HA.40 | Kasatkinite | Ba2Ca8B5Si8O32(OH)3 · 6H2O | Mon. |
| 9.HA.40 | Igumnovite | Ca3Al2[SiO4]2[◻Cl4] | Iso. |
| 9.HA.42 | Qeltite | Ca3TiSi2(Fe3+2Si)O14 | Trig. 32 : _P_321 |
| 9.HA.45 | Rippite | K2(Nb,Ti)2(Si4O12)O(O,F) | Tet. |
| 9.HA.47 | Zagamiite | CaAl2Si3.5O11 | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_63/m m c |
| 9.HA.50 | Rudenkoite | Sr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2O | Mon. |
| 9.HA.50 | α-Carnegieite | NaAlSiO4 | |
| 9.HA.52 | Atheriastite | near Ca5MgFeAl6Si8O32 · 5H2O | |
| 9.HA.55 | Foshallasite | Ca3[Si2O7] · 3H2O(?) | |
| 9.HA.55 | Balvraidite | ||
| 9.HA.57 | Bhreckite | Ca, Mg, Fe, Si, O, H | |
| 9.HA.60 | Nagelschmidtite | Ca7(SiO4)2(PO4)2 | Hex. 6 : _P_61 |
| 9.HA.60 | Bravaisite | ||
| 9.HA.65 | Caryochroite | [Na(Sr0.5Ca0.5)Mg]3[Fe3+8Mn(Fe2+0.5◻0.5)]10(Ti2Si12O37)(OH)14(H2O)3 | Mon. 2/m |
| 9.HA.70 | Juanite | Ca10Mg4Al2Si11O39 · 4H2O or near | Orth. |
| 9.HA.75 | Tacharanite | Ca12Al2Si18O33 (OH)36 | Mon. |
| 9.HA.80 | Oyelite | Ca10Si8B2O29 · 12.5H2O | Tric. 1 : _P_1 |
| 9.HA.85 | Denisovite | K14+x(Ca,Na,Mn,Fe)48[Si60O162]F16(Ox,OH4-x) · 2H2O | Mon. |
| 9.HA.90 | Tiettaite | K4Na12Fe3+Si16O41(OH)4 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c m |
Other InformationHide
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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 PaqueiteHide
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References for PaqueiteHide
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Localities for PaqueiteHide
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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
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- 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.
| Israel | |
|---|---|
| Southern District (HaDarom District) Tamar Regional Council Hatrurim Basin ⓘ Halamish wadi (Ẕuq Tamrur) | Galuskin EV |
| Mexico (TL) | |
| Chihuahua Pueblito de Allende ⓘ Allende meteorite (TL) | Williams et al. (2013) +3 other references |