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Albrechtschraufite

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Albrech Schrauf
Formula:
Ca4Mg(UO2)2(CO3)6F2 · 17-18H2O
Colour:
Yellow-green
Lustre:
Vitreous
Hardness:
2 - 3
Specific Gravity:
2.6
Crystal System:
Triclinic
Name:
Named in 1984 by Kurt Mereiter in honor of Albrecht Schrauf [December 14, 1837, Wien (Vienna), Austria – November 29, 1897, Wien (Vienna), Austria] in recognition of his contributions to the knowledge of uranyl carbonate minerals at the discovery locality. Schrauf was professor of Mineralogy and curator of the Imperial Hofmineralien Cabinet, University of Vienna. Schrauf was an internationally important morphological crystallographer and author. He wrote "Atlas der Krystallformen des Mineralreiches" and much honored textbook "Lehrbuch der physikalischen Mineralogie". He worked with Gustav Tschermak in editing the journal, "Mineralogische Mitteilungen". Schrauf was blinded in his left eye in 1893 when he was making crystallographic measurements and the full intensity of the sun's rays accidentally were directed to his eye.
Visually similar to liebigite and other secondary U minerals.


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Classification of AlbrechtschraufiteHide

Approved
Approval Year:
1983
5.ED.15

5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
D : UO2:CO3 = 1:3
16b.7.11.1

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
12.1.25

12 : Carbonates with other anions
1 : Carbonates with halides

Physical Properties of AlbrechtschraufiteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Yellow-green
Streak:
White
Hardness:
2 - 3 on Mohs scale
Density:
2.6 g/cm3 (Measured)    2.67 g/cm3 (Calculated)

Chemical Properties of AlbrechtschraufiteHide

Formula:
Ca4Mg(UO2)2(CO3)6F2 · 17-18H2O
IMA Formula:
Ca4Mg(UO2)2(CO3)6F2 · 17H2O

Crystallography of AlbrechtschraufiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 13.569(2) Å, b = 13.419(2) Å, c = 11.622(2) Å
α = 115.82(1)°, β = 107.61(1)°, γ = 92.84(1)°
Ratio:
a:b:c = 1.011 : 1 : 0.866
Unit Cell V:
1774.6 ų
Z:
2
Comment:
Structural cell, not reduced.

Type Occurrence of AlbrechtschraufiteHide

Place of Conservation of Type Material:
Natural History Museum, Vienna, Austria, A.a. 6740 (schröckingerite specimen on which the mineral was discovered).
Geological Setting of Type Material:
On a museum specimen of schröckingerite.
Associated Minerals at Type Locality:

Synonyms of AlbrechtschraufiteHide

Other Language Names for AlbrechtschraufiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Schröckingerite1 photo of Albrechtschraufite associated with Schröckingerite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.ED.05BayleyiteMg2(UO2)(CO3)3 · 18H2OMon.
5.ED.10SwartziteMgCa(UO2)(CO3)3 · 12H2OMon. 2/m : P21/m
5.ED.20LiebigiteCa2(UO2)(CO3)3 · 11H2OOrth. mm2
5.ED.25RabbittiteCa3Mg3(UO2)2(CO3)6(OH)4 · 18H2OMon.
5.ED.30AndersoniteNa2Ca(UO2)(CO3)3 · 6H2OTrig. 3 : R3
5.ED.35GrimseliteK3Na(UO2)(CO3)3 · H2OHex.
5.ED.40WidenmannitePb2(OH)2[(UO2)(CO3)2]Orth.
5.ED.45ZnucaliteZn12Ca(UO2)(CO3)3(OH)22 · 4H2OOrth.
5.ED.50ČejkaiteNa4(UO2)(CO3)3Tric.
5.ED.50AgricolaiteK4(UO2)(CO3)3Mon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

12.1.1NorthupiteNa3Mg(CO3)2ClIso. m3 (2/m 3) : Fd3
12.1.2BarentsiteNa7Al(HCO3)2(CO3)2F4Tric.
12.1.3RouvilleiteNa3(Ca,Mn,Fe)2(CO3)3FMon. 2/m : B2/b
12.1.4ChlormagaluminiteMg4Al2(OH)12Cl2 · 3H2OHex.
12.1.5DeferniteCa6(CO3)2-x(SiO4)x(OH)7(Cl,OH)1-2x (x<0.5)Orth. mmm (2/m 2/m 2/m) : Pnma
12.1.6BrenkiteCa2(CO3)F2Orth.
12.1.7Stenonite(Sr,Ba,Na)2Al(CO3)F5Mon. 2/m
12.1.8Bastnäsite-(Ce)Ce(CO3)FHex. 6 m2 : P6c2
12.1.9Bastnäsite-(La)La(CO3)FHex.
12.1.10Bastnäsite-(Y)Y(CO3)FHex. 6 m2 : P62c
12.1.11Parisite-(Ce)CaCe2(CO3)3F2Mon. m : Bb
12.1.12Parisite-(Nd)Ca(Nd,Ce,La)2(CO3)3F2
12.1.13Synchysite-(Ce)CaCe(CO3)2FMon. 2/m : B2/b
12.1.14Synchysite-(Y)CaY(CO3)2FMon. 2/m : B2/b
12.1.15Synchysite-(Nd)CaNd(CO3)2F
12.1.16Röntgenite-(Ce)Ca2(Ce,La)3(CO3)5F3Trig. 3 : R3
12.1.17Cordylite-(Ce)NaBaCe2(CO3)4F Hex.
12.1.19Huanghoite-(Ce)BaCe(CO3)2FTrig. 3m (3 2/m) : R3m
12.1.20Zhonghuacerite-(Ce)Ba2Ce(CO3)3FTrig.
12.1.21Cebaite-(Ce)Ba3Ce2(CO3)5F2
12.1.22ThorbastnäsiteThCa(CO3)2F2 · 3H2O
12.1.23PhosgenitePb2CO3Cl2Tet. 4/mmm (4/m 2/m 2/m) : P4/mbm
12.1.24BarstowitePb4Cl6(CO3) · H2OMon. 2/m : P21/m
12.1.26KettneriteCaBiCO3OFOrth. mmm (2/m 2/m 2/m)

Other InformationHide

Special Storage/
Display Requirements:
Radioactive - Contains uranium - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest. Avoid prolonged exposure in proximity of the body. Store away from inhabited areas.
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 AlbrechtschraufiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mereiter, K. (1984) The crystal structure of albrechtschraufite, MgCa4F2[(UO2)(CO3)3]2.17H2O. Acta Crystallographica A40: C247.
Ondruš, P., Veselovský, F., Hloušek, J., Skála, R., Vavřín, I., Frýda, J., Čejka, J., Gabašová, A. (1997): Secondary minerals of the Jáchymov (Joachimsthal) ore district. J. Czech Geol. Soc.: 42: 3-76.
Mereiter, K. (2013) Description and crystal structure of albrechtschraufite, MgCa4F2[UO2(CO3)3]2⋅17-18H2O. Mineralogy and Petrology: 107: 179-188.

Internet Links for AlbrechtschraufiteHide

Localities for AlbrechtschraufiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic (TL)
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
Acta Cryst.(1984) A40, C247; Mereiter, K. (2013): Description and crystal structure of albrechtschraufite, MgCa4F2[UO2(CO3)3]2⋅17-18H2O. Mineralogy and Petrology, 107, 179-188.
Mineral and/or Locality  
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