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Zippeite

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Franz Xaver Maximilian Zippe
Formula:
K3(UO2)4(SO4)2O3(OH) · 3H2O
System:
Monoclinic
Colour:
Golden yellow, light ...
Hardness:
2
Member of:
Name:
Named by William Haidinger in 1845 in honour of František Xaver Maximilian Zippe (1791-1863), Austrian mineralogist.
NOTE: Many of the specimens that are labeled "Zippeite" are actually Natrozippeite (the sodium-dominant member of the group), especially those from sedimentary deposits.

Classification of Zippeite

Approved
7.EC.05

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
E : Uranyl sulfates
C : With medium-sized and large cations
31.10.4.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
10 : Miscellaneous
25.8.11

25 : Sulphates
8 : Sulphates of Sb, V, Cr and U
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http://www.mindat.org/min-4420.html
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First Recorded Occurrence of Zippeite

Year of Discovery:
1845
Associated Minerals at First Recorded Locality:

Physical Properties of Zippeite

Silky, Dull
Diaphaneity (Transparency):
Translucent
Comment:
Aggregates dull to silky.
Colour:
Golden yellow, light yellow, orange-yellow
Streak:
White, yellow
Hardness (Mohs):
2
Cleavage:
Perfect
On {010} probable, perfect.
Density:
4.794 g/cm3 (Calculated)

Crystallography of Zippeite

Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
B2
Space Group Setting:
C2
Cell Parameters:
a = 8.7524(4) Å, b = 13.9197(7) Å, c = 17.6972(8) Å
β = 104.178(1)°
Ratio:
a:b:c = 0.629 : 1 : 1.271
Unit Cell Volume:
V 2,090.39 ų (Calculated from Unit Cell)
Morphology:
Crystals flattened {010}. Commonly spindle- or lens-shaped; rhomboidal or lath-like at times. Occurs as delicate crusts, reniform or spheroidal aggregates comprised of microscopic crystals; pulverulent to earthy.

Optical Data of Zippeite

Type:
Biaxial (-)
RI values:
nα = 1.550 - 1.655 nβ = 1.717 nγ = 1.765
Max Birefringence:
δ = 0.215
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
strong
Pleochroism:
Visible
Comments:
X = Nearly colourless
Y = Light yellow to orange-yellow
Z = Deep yellow to orange-yellow

Chemical Properties of Zippeite

Formula:
K3(UO2)4(SO4)2O3(OH) · 3H2O
Essential elements:
All elements listed in formula:

Relationship of Zippeite to other Species

Member of:
Other Members of Group:
CobaltzippeiteCo(UO2)2(SO4)O2 · 3.5H2O
MagnesiozippeiteMg(UO2)2(SO4)O2 · 3.5H2O
NatrozippeiteNa5(UO2)8(SO4)4O5(OH)3 · 12H2O
NickelzippeiteNi(UO2)2(SO4)O2 · 3.5H2O (?)
PseudojohanniteCu6.5(UO2)8(SO4)4O8(OH)5 · 25H2O
Sejkoraite-(Y)Y2(UO2)8(SO4)4O6(OH)2 · 26H2O
ZinczippeiteZn(UO2)2(SO4)O2 · 3.5H2O
7.EC.05CobaltzippeiteCo(UO2)2(SO4)O2 · 3.5H2O
7.EC.05MagnesiozippeiteMg(UO2)2(SO4)O2 · 3.5H2O
7.EC.05NickelzippeiteNi(UO2)2(SO4)O2 · 3.5H2O (?)
7.EC.05NatrozippeiteNa5(UO2)8(SO4)4O5(OH)3 · 12H2O
7.EC.05ZinczippeiteZn(UO2)2(SO4)O2 · 3.5H2O
7.EC.10RabejaciteCa(UO2)4(SO4)2(OH)6 · 6H2O
7.EC.15MarécottiteMg3(UO2)8(SO4)4O6(OH)2 · 28H2O
7.EC.15Sejkoraite-(Y)Y2(UO2)8(SO4)4O6(OH)2 · 26H2O
7.EC.20PseudojohanniteCu6.5(UO2)8(SO4)4O8(OH)5 · 25H2O
25.8.1Klebelsbergite(SbO)4(SO4)(OH)2
25.8.2CoquanditeSb6+xO8+x(SO4)(OH)x(H2O)1- x (x = 0.3)
25.8.3PeretaiteCa(SbO)4(SO4)2(OH)2 · 2H2O
25.8.4CannoniteBi2(SO4)O(OH)2
25.8.5Minasragrite(V4+O)(SO4) · 5H2O
25.8.6Stanleyite(V4+O)(SO4) · 6H2O
25.8.7Redingtonite(Fe2+,Mg,Ni)(Cr,Al)2(SO4)4·22H2O
25.8.8Metauranopilite(UO2)6(SO4)(OH)10 · 5H2O
25.8.9Uranopilite(UO2)6(SO4)O2(OH)6 · 14H2O
25.8.10NatrozippeiteNa5(UO2)8(SO4)4O5(OH)3 · 12H2O
25.8.12JohanniteCu(UO2)2(SO4)2(OH)2 · 8H2O
25.8.13MagnesiozippeiteMg(UO2)2(SO4)O2 · 3.5H2O
25.8.14ZinczippeiteZn(UO2)2(SO4)O2 · 3.5H2O

Other Names for Zippeite

Name in Other Languages:

Other Information

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 Zippeite

Reference List:
John (1821) Chem. Unters.: 5 (as Basisches schwefelsaures Uranoxyd).

Zippe (1824) Verhl. Ges. Mus. Böhm.: 81 (as Uranblüthe).

Haidinger (1845): 510 (as Zippeit).

John (1845) Jb. Min.: 299 (as Basisches schwefelsaures Uranoxyd).

Vogl (1857) Min. Joachimsthal: 124 (as Uranoker).

Adam, M. (1869) Tableau minéralogique, Paris: 64 (as Dauberite).

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 159.

Hess (1924) USGS Bull. 750D.

Nováček (1935) K. Česká Společnost nauk; Třída Matematicko-Přírodověděcká, Prague, Memoires (Société royale des sciences de Bohême, Prague), Cl. 2, no. 7.

Palache, C., Berman, H., & Frondel, C. (1951) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 598-600.

Canadian Mineralogist (1976): 14: 429-436.

Vochten, R., Van Haverbeke, L., Van Springel, K., Blaton, N., and Peeters, O.M. (1995) The structure and physiochemical characteristics of synthetic zippeite. Canadian Mineralogist: 33: 1091-1101.

Journal of the Czech Geological Society, Prague (1997): 42(4): 57-58.

Burns, P.C., Deely, K.M., and Hayden, L.A. (2003) The crystal chemistry of the zippeite group. Canadian Mineralogist 41(3), 687-706.

Burns, P.C. (2005) U6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43, 1839-1894.

J. Plášil, J.S. Mills, K. Fejfarová, M. Dušek, M. Novák, R. Škoda, J. Čejka, J. Sejkora (2011): The crystal structure of natural zippeite, K1.85H+0.15[(UO2)4O2(SO4)2(OH)2](H2O)4, from Jáchymov, Czech Republic. Can. Mineral. 49, 1089-1103.

Internet Links for Zippeite

Localities for Zippeite

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.
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