General Caresite Information
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Chemical Formula: |
Fe++4Al2(OH)12CO3·3(H2O) |
Composition: |
Molecular Weight = 595.49 gm |
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Aluminum 9.06 % Al 17.12 % Al2O3 |
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Iron 37.51 % Fe 48.26 % FeO |
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Hydrogen 3.05 % H 27.23 % H2O |
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Carbon 2.02 % C 7.39 % CO2 |
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Oxygen 48.36 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
Fe2+4Al2(CO3)(OH)12·3(H2O) |
Environment: |
In silicate and carbonate cavities and in nepheline syenite pegmatites. |
IMA Status: |
Approved IMA 1997 |
Locality: |
Poudrette quarry, Mont Saint-Hilaire, Rouville County, Quebec, as well as in the Corporation quarry, Montreal, Quebec, Canada. Link to MinDat.org Location Data. |
Name Origin: |
Named after Steve Cares (1909-) and Janet Cares (1921-) of Sudbury, MA, Canada, who found the mineral. |
Synonym: |
IMA1992-030 |
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Caresite Image |
Images:
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Caresite
Comments: Tabular brownish-yellow crystals of caresite in matrix.
Location: Poudrette quarry, Mt Saint-Hilaire, Rouville Co., Qu?bec, Canada.
Scale: Picture size 2.5 mm.
© Thomas Witzke / Abraxas-Verlag |
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Caresite Crystallography
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Axial Ratios: |
a:c = 1:2.08051 |
Cell Dimensions: |
a = 10.805, c = 22.48, Z = 6; V = 2,272.88 Den(Calc)= 2.61 |
Crystal System: |
Trigonal - TrapezohedralH-M Symbol (3 2) Space Group: P 3112 or P 3212 |
X Ray Diffraction: |
By Intensity(I/Io): 7.49(1), 3.746(0.5), 2.625(0.4), |
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Physical Properties of Caresite
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Cleavage: |
[001] Perfect |
Color: |
Colorless, Yellow, Orange brown. |
Density: |
2.57 - 2.59, Average = 2.58 |
Diaphaniety: |
Transparent |
Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
Habit: |
Tabular - Form dimensions are thin in one direction. |
Hardness: |
2 - Gypsum |
Luster: |
Vitreous (Glassy) |
Streak: |
white |
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Optical Properties of Caresite
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Gladstone-Dale: |
CI meas= 0.033 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2239,KPDmeas= 0.2266,KC= 0.2343 |
Optical Data: |
Uniaxial (-), e=1.57, w=1.599, bire=0.0290. |
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Calculated Properties of Caresite
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Electron Density: |
relectron=2.58 gm/cc note: rCaresite =2.58 gm/cc. |
Fermion Index |
Fermion Index = 0.00841 Boson Index = 0.99159 |
Photoelectric: |
PECaresite = 11.27 barns/electron U=PECaresite x relectron= 29.11 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Caresite is Not Radioactive |
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Caresite Classification
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Dana Class: |
16b.6.4.3 (16b)Carbonates - Hydroxyl or Halogen |
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(16b.6)Dana Type |
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(16b.6.4)Dana Group |
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16b.6.4.1 Quintinite-2H Mg4Al2(OH)12CO3·4(H2O) P 6322 6 2 2 |
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16b.6.4.2 Quintinite-3T Mg4Al2(OH)12CO3·4(H2O) P 3112,P 3212 3 2 |
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16b.6.4.3 Caresite Fe4Al2(OH)12CO3·3(H2O) P 3112 or P 3212 3 2 |
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16b.6.4.4 Charmarite-2H Mn4Al2(CO3)(OH)12·3(H2O) P 6322 6 2 2 |
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16b.6.4.5 Charmarite-3T Mn4Al2(CO3)(OH)12·3(H2O) P 3112 3 2 |
Strunz Class: |
V/E.02-07 V - Nitrates, Carbonates and Borates |
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V/E - Water-bearing carbonates with unfamiliar anions |
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V/E.02 - Manasseite group |
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V/E.02-05 Quintinite-2H Mg4Al2(OH)12CO3·4(H2O) P 6322 6 2 2 |
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V/E.02-05* Quintinite-3T Mg4Al2(OH)12CO3·4(H2O) P 3112,P 3212 3 2 |
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V/E.02-07 Caresite Fe4Al2(OH)12CO3·3(H2O) P 3112 or P 3212 3 2 |
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V/E.02-08 Charmarite-2H Mn4Al2(CO3)(OH)12·3(H2O) P 6322 6 2 2 |
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V/E.02-08* Charmarite-3T Mn4Al2(CO3)(OH)12·3(H2O) P 3112 3 2 |
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V/E.02-09 Zaccagnaite! Zn4Al2(OH)12(CO3)·3(H2O) P 63/mmc 6/m 2/m 2/m |
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V/E.02-10 Manasseite Mg6Al2(CO3)(OH)16·4(H2O) P 63/mmc 6/m 2/m 2/m |
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V/E.02-20 Chlormagaluminite (Mg,Fe)4Al2(OH)12(Cl2,CO3)·2(H2O) P 6/mcm, P 6cm, P 6c2 Hex |
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V/E.02-30 Barbertonite Mg6Cr2(CO3)(OH)16·4(H2O) P 63/mmc 6/m 2/m 2/m |
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V/E.02-40 Sjogrenite Mg6Fe2(CO3)(OH)14·5(H2O) P 63/mmc 6/m 2/m 2/m |
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Other Caresite Information
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References: |
NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.83,p1347,1998) OPTIC PROP.(Dana8) |
See Also: |
Links to other databases for Caresite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 -Am. Min. Crystal Structure Database
4 -Athena
5 -Google Images
6 -Google Scholar
7 -Handbook of Mineralogy (UofA)
8 -MinDAT
9 -MinMax(Deutsch)
10 -MinMax(English)
11 -Mineralienatlas (Deutsch)
12 -QUT Mineral Atlas
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Caresite
Fe++4Al2(OH)12CO3·3(H2O)
Dana No: 16b.6.4.3 Strunz No: V/E.02-07
Locality:
Notes:
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