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Carlosruizite

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Carlos Ruiz Fuller
Formula:
K6(Na,K)4Na6Mg10(SeO4)12(IO3)12 · 12H2O
System:
Trigonal
Colour:
Colourless to pale ...
Lustre:
Vitreous
Hardness:
2½ - 3
Name:
Named in 1994 by Judith A. Konnert, Howard T. Evans, Jr., James J. McGee, and George E. Ericksen in honor of Carlos Ruiz Fuller [September 23, 1916 Valparaiso, Chile – March 28, 1997 Santiago, Chile], first Director of the Chilean Geological Survey.
Isostructural with:
Carlosruizite-Fuenzalidaite Series. The Se analogue of fuenzalidaite. Unique combination of elements; the only selenate-iodate mineral known. The first Se-bearing material among the Chilean nitrate ores.

Leached from 'Caliche Amarillo'.

The structure is based on two complex slabs, normal to the c axis; each slab consists of a double layer formed by trigonal-pyramidal iodate groups, bounded at the top and bottom by layers of (Se,S,Cr)O4 groups. The layers are separated by K+, with Na+ and Mg2+ helding the layer complex together. The structure somewhat resembles that of alunite group members.


Classification of Carlosruizite

Approved
7.DG.40

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
G : With large and medium-sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3
Dana 7th ed.:
23.1.2.2
23.1.2.2

23 : COMPOUND IODATES
1 : Miscellaneous

Type Occurrence of Carlosruizite

General Appearance of Type Material:
thin hexagonal plates, {0001} form (beveled by {10_12} at the edges), up to 0.2 mm
Geological Setting of Type Material:
"caliche amarillo" (yellow nitrate ore) leachate

Physical Properties of Carlosruizite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colourless to pale yellow.
Hardness (Mohs):
2½ - 3
Density:
3.400 g/cm3 (Calculated)

Crystallography of Carlosruizite

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
P3c1
Space Group Setting:
P3c1
Cell Parameters:
a = 9.5901(8) Å, c = 27.56(2) Å
Ratio:
a:c = 1 : 2.874
Unit Cell Volume:
V 2,195.11 ų (Calculated from Unit Cell)
Z:
1
X-Ray Powder Diffraction Data:
d-spacingIntensity
13.75 (30)
7.10 (20)
3.561 (100)
3.082 (32)
3.058 (39)
2.715 (39)

Optical Data of Carlosruizite

Type:
Uniaxial (-)
RI values:
nω = 1.655() nε = 1.642(1)
Max Birefringence:
δ = 0.013
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Carlosruizite

Formula:
K6(Na,K)4Na6Mg10(SeO4)12(IO3)12 · 12H2O
All elements listed in formula:
Analytical Data:
Electron microprobe, wt.%, mean of 10 analyses
K2O 6.7
Na2O 4.7
MgO 9.2
SO3 7.9
SeO3 19.0
CrO3 2.5
I2O5 45.6

total 95.6

Relationship of Carlosruizite to other Species

Series:
Forms a series with Fuenzalidaite (see here)
7.DG.05DarapskiteNa3(SO4)(NO3) · H2O
7.DG.10Clinoungemachite(Na, K, Fe, SO4)
7.DG.10HumberstoniteNa7K3Mg2(SO4)6(NO3)2 · 6H2O
7.DG.10UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2O
7.DG.15BentoriteCa6(Cr3+,Al)2(SO4)3(OH)12 · 26H2O
7.DG.15CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2O
7.DG.15EttringiteCa6Al2(SO4)3(OH)12 · 26H2O
7.DG.15JouravskiteCa3Mn4+(SO4)(CO3)(OH)6 · 12H2O
7.DG.15SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2O
7.DG.15ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2O
7.DG.15CarraraiteCa3(SO4)[Ge(OH)6](CO3) · 12H2O
7.DG.15BuryatiteCa3(Si,Fe,Al)(SO4)[B(OH)4]O(OH)5 · 12H2O
7.DG.20RapidcreekiteCa2(SO4)(CO3) · 4H2O
7.DG.20KorkinoiteCa4(SO4)2(CO3)2 · 9(H2O)
7.DG.25TatarskiteCa6Mg2(SO4)2(CO3)2(OH)4Cl4 · 7H2O
7.DG.30NakauriiteCu8(SO4)4(CO3)(OH)6 · 48H2O
7.DG.35Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2O
7.DG.40FuenzalidaiteK6(Na,K)4Na6Mg10(SO4)12(IO3)12 · 12H2O
7.DG.45Chelyabinskite(Ca,Mg)3(SO4,CO3)2[Si(OH)6] · 9H2O (?)
23.1.2.1FuenzalidaiteK6(Na,K)4Na6Mg10(SO4)12(IO3)12 · 12H2O

Other Names for Carlosruizite

Name in Other Languages:

Other Information

Other Information:
Slowly soluble in H2O
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Carlosruizite

Reference List:
New Minerals (1997), New Minerals 1990-1994.

Konnert, J.A., Evans, H.T.Jr., McGee, J.J., Ericksen, G.E. (1994): Mineralogical studies of the nitrate deposits of Chile: VII. Two new saline minerals with the composition K6(Na,K)4Na6Mg10(XO4)12(IO3)12.l2H2O: Fuenzalidaite (X = S) and carlosruizite (X = Se). American Mineralogist: 79: 1003-1008.

Internet Links for Carlosruizite

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http://www.mindat.org/min-902.html
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Localities for Carlosruizite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Chile
 
  • Tarapacá Region
    • El Tamarugal Province
Gunnar Farber specimen label.
[American Mineralogist (1994) 79, 1003-1008; MinRec 27:201]
Mineral and/or Locality  
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