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Albrechtschraufite

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Albrech Schrauf
Formula:
Ca4Mg(UO2)2(CO3)6F2 · 17-18H2O
System:
Triclinic
Colour:
Yellow-green
Lustre:
Vitreous
Hardness:
2 - 3
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.

Classification of Albrechtschraufite

Approved 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
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Type Occurrence of Albrechtschraufite

Place of Conservation of Type Material:
Natural History Museum, Vienna, Austria, A.a. 6740 (schröckingerite specimen on which the mineral was discovered).
Year of Discovery:
1983
Geological Setting of Type Material:
On a museum specimen of schröckingerite.
Associated Minerals at Type Locality:

Physical Properties of Albrechtschraufite

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

Crystallography of Albrechtschraufite

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 Volume:
V 1774.6 ų
Z:
2
Comment:
Structural cell, not reduced.

Chemical Properties of Albrechtschraufite

Formula:
Ca4Mg(UO2)2(CO3)6F2 · 17-18H2O
Essential elements:
All elements listed in formula:

Relationship of Albrechtschraufite to other Species

5.ED.05BayleyiteMg2(UO2)(CO3)3 · 18H2O
5.ED.10SwartziteMgCa(UO2)(CO3)3 · 12H2O
5.ED.20LiebigiteCa2(UO2)(CO3)3 · 11H2O
5.ED.25RabbittiteCa3Mg3(UO2)2(CO3)6(OH)4 · 18H2O
5.ED.30AndersoniteNa2Ca(UO2)(CO3)3 · 6H2O
5.ED.35GrimseliteK3Na(UO2)(CO3)3 · H2O
5.ED.40WidenmannitePb2(OH)2[(UO2)(CO3)2]
5.ED.45ZnucaliteZn12Ca(UO2)(CO3)3(OH)22 · 4H2O
5.ED.50ČejkaiteNa4(UO2)(CO3)3
5.ED.50AgricolaiteK4(UO2)(CO3)3
12.1.1NorthupiteNa3Mg(CO3)2Cl
12.1.2BarentsiteNa7Al(HCO3)2(CO3)2F4
12.1.3RouvilleiteNa3(Ca,Mn,Fe)2(CO3)3F
12.1.4ChlormagaluminiteMg4Al2(OH)12Cl2 · 3H2O
12.1.5DeferniteCa6(CO3)2-x(SiO4)x(OH)7(Cl,OH)1-2x (x<0.5)
12.1.6BrenkiteCa2(CO3)F2
12.1.7Stenonite(Sr,Ba,Na)2Al(CO3)F5
12.1.8Bastnäsite-(Ce)(Ce,La)(CO3)F
12.1.9Bastnäsite-(La)(La,Ce)(CO3)F
12.1.10Bastnäsite-(Y)(Y,Ce)(CO3)F
12.1.11Parisite-(Ce)Ca(Ce,La)2(CO3)3F2
12.1.12Parisite-(Nd)Ca(Nd,Ce,La)2(CO3)3F2
12.1.13Synchysite-(Ce)Ca(Ce,La)(CO3)2F
12.1.14Synchysite-(Y)Ca(Y,Ce)(CO3)2F
12.1.15Synchysite-(Nd)Ca(Nd,Y,Gd)(CO3)2F
12.1.16Röntgenite-(Ce)Ca2(Ce,La)3(CO3)5F3
12.1.17Cordylite-(Ce)NaBaCe2(CO3)4F
12.1.19Huanghoite-(Ce)BaCe(CO3)2F
12.1.20Zhonghuacerite-(Ce)Ba2Ce(CO3)3F
12.1.21Cebaite-(Ce)Ba3Ce2(CO3)5F2
12.1.22ThorbastnäsiteTh(Ca,Ce)(CO3)2F2 · 3H2O
12.1.23PhosgenitePb2CO3Cl2
12.1.24BarstowitePb4Cl6(CO3) · H2O
12.1.26KettneriteCaBiCO3OF

Other Names for Albrechtschraufite

Name in Other Languages:

Other Information

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 Albrechtschraufite

Reference List:
Mereiter, K. (1984): The crystal structure of albrechtschraufite, MgCa4F2[(UO2)(CO3)3]2.17H2O. Acta Crystallogr., A40, C247.

Ondruš, P., Veselovský, F., Hloušek, J., Skála, R., Vavřín, I., Frýda, J., Čejka, J. and 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 Albrechtschraufite

Localities for Albrechtschraufite

(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.
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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