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Serpierite

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Formula:
Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O
System:
Monoclinic
Colour:
Dark sky-blue ...
Lustre:
Pearly
Hardness:
2
Name:
Named in 1881 by Alfred Lewis Oliver Legrand Des Cloizeaux in honor of Giovanni Battista Serpieri [March 23, 1832 Rimini, Italia - October 17, 1897 Athens, Greece], revolutionary, engineer, Italian mining entrepreneur, and a developer of mines in the Lavrion District, Attiki, Greece.
Isostructural with:
Devilline Group. Ca-analogue of aldridgeite.

Platy varieties are visually indistinguishable from orthoserpierite.

Classification of Serpierite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
7.DD.30

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra
Dana 7th ed.:
31.6.2.1
31.6.2.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
6 : (AB)5(XO4)2Zq·xH2O
25.5.7

25 : Sulphates
5 : Sulphates of Zn and Hg
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http://www.mindat.org/min-3625.html
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First Recorded Occurrence of Serpierite

Year of Discovery:
1881
Associated Minerals at First Recorded Locality:

Physical Properties of Serpierite

Pearly
Diaphaneity (Transparency):
Transparent
Comment:
Pearly on the cleavage.
Colour:
Dark sky-blue ("linarite-blue") to medium sky-blue; greenish blue in transmitted light.
Streak:
White or pale blue
Hardness (Mohs):
2
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {001}.
Fracture:
Splintery
Density:
3.07 g/cm3 (Measured)    3.08 g/cm3 (Calculated)

Crystallography of Serpierite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Space Group Setting:
C2/c
Cell Parameters:
a = 22.186Å, b = 6.25Å, c = 21.853Å
β = 113.37°
Ratio:
a:b:c = 3.55 : 1 : 3.496
Unit Cell Volume:
V 2,781.60 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Typically occurs as clusters or sprays of lath-like to acicular micro-crystals, elongated on [100] and flattened on {001}; more rarely botryoidal.
X-Ray Powder Diffraction Data:
d-spacingIntensity
10.20(100)
5.09(80)
3.39(80)
2.71(60)
2.65(60)
2.44(60)
2.17(60)
1.57(60)

Optical Data of Serpierite

Type:
Biaxial (-)
RI values:
nα = 1.583 nβ = 1.641 nγ = 1.648
2V:
Measured: 33° to 37°, Calculated: 36°
Max Birefringence:
δ = 0.065
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
small
Pleochroism:
Visible
Comments:
X = c = Nearly colourless
Y = a = Deep greenish blue
Z = b = Deep greenish blue

Chemical Properties of Serpierite

Formula:
Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O
Essential elements:
All elements listed in formula:

Relationship of Serpierite to other Species

Structurally related to group(s):
7.DD.05FelsőbányaiteAl4(SO4)(OH)10 · 4H2O
7.DD.10LangiteCu4(SO4)(OH)6 · 2H2O
7.DD.10PosnjakiteCu4(SO4)(OH)6 · H2O
7.DD.10WroewolfeiteCu4(SO4)(OH)6 · 2H2O
7.DD.15SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
7.DD.20KtenasiteZn(Cu,Zn)4(SO4)2(OH)6 · 6H2O
7.DD.25ChristeliteCu2Zn3(SO4)2(OH)6 · 4H2O
7.DD.30CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2O
7.DD.30DevillineCaCu4(SO4)2(OH)6 · 3H2O
7.DD.30OrthoserpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7.DD.30NiedermayriteCdCu4(SO4)2(OH)6 · 4H2O
7.DD.30EdwardsiteCu3Cd2(SO4)2(OH)6·4H2O
7.DD.35Carrboydite[(Ni1-xAlx)(OH)2][SO4]x/2 · nH2O
7.DD.35Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2O
7.DD.35Honessite(Ni1-xFex3+)(OH)2[SO4]x/2 · nH2O
7.DD.35Hydrohonessite(Ni1-xFex3+)(OH)2[SO4]x/2 · nH2O
7.DD.35MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.35Mountkeithite[(Mg1-xFex3+)(OH)2][SO4]x/2 · nH2O
7.DD.35ShigaiteMn6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.35WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2O
7.DD.35WoodwarditeCu1-xAlx(OH)2[SO4]x/2 · nH2O
7.DD.35ZincaluminiteZn6Al6(SO4)2(OH)16 · 5H2O
7.DD.35Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O
7.DD.35ZincowoodwarditeZn1-xAlx(OH)2[SO4]x/2 · nH2O
7.DD.35NatroglaucoceriniteNaxZn8-yAly(SO4)(x+y)/2(OH)16 · 6H2O
7.DD.35NikischeriteFe62+Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.40Lawsonbauerite(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O
7.DD.40Torreyite(Mg,Mn2+)72Mn22+Zn4(SO4)2(OH)22 · 8H2O
7.DD.45MooreiteMg92Mn2Zn4(SO4)2(OH)26 · 8H2O
7.DD.50Namuwite(Zn,Cu)4(SO4)(OH)6 · 4H2O
7.DD.55Bechererite(Zn,Cu)6Zn2(SO4,HSiO4)2(OH)12
7.DD.60Ramsbeckite(Cu,Zn)15(SO4)4(OH)22 · 6H2O
7.DD.65VonbezingiteCa6Cu3(SO4)3(OH)12 · 2H2O
7.DD.70RedgilliteCu6(SO4)(OH)10 · H2O
7.DD.75ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
7.DD.75Nickelalumite(Ni,Cu)Al4(SO4,(NO3)2)(OH)12 · 3H2O
7.DD.75KyrgyzstaniteZnAl4(SO4)(OH)12·3H2O
7.DD.80Guarinoite(Zn,Co,Ni)6(SO4)(OH,Cl)10 · 5H2O
7.DD.80Schulenbergite(Cu,Zn)7(SO4,CO3)2(OH)10 · 3H2O
7.DD.80Thérèsemagnanite(Co,Zn,Ni)6(SO4)(OH,Cl)10 · 8H2O
7.DD.80UM1992-30-SO:CCuHZn(Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2O
7.DD.85MontetrisaiteCu6(SO4)(OH)10 · 2H2O
25.5.1ZinkositeZnSO4
25.5.2GoslariteZnSO4 · 7H2O
25.5.3Namuwite(Zn,Cu)4(SO4)(OH)6 · 4H2O
25.5.4KtenasiteZn(Cu,Zn)4(SO4)2(OH)6 · 6H2O
25.5.5Ramsbeckite(Cu,Zn)15(SO4)4(OH)22 · 6H2O
25.5.6Boyleite(Zn,Mg)SO4 · 4H2O
25.5.8OrthoserpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
25.5.9ZincaluminiteZn6Al6(SO4)2(OH)16 · 5H2O
25.5.10Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2O
25.5.11GunningiteZnSO4 · H2O
25.5.12ChaidamuiteZnFe3+(SO4)2(OH) · 4H2O
25.5.13Bianchite(Zn,Fe)SO4 · 6H2O
25.5.15Zincmelanterite(Zn,Cu,Fe)SO4 · 7H2O
25.5.16Zincobotryogen(Zn,Mg,Mn2+)Fe3+(SO4)2(OH) · 7H2O
25.5.17SchuetteiteHg32+(SO4)O2
25.5.18Gianellaite(Hg2N)2SO4

Other Names for Serpierite

Name in Other Languages:

Other Information

Other Information:
Readily soluble in acids.
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 Serpierite

Reference List:
Des Cloizeaux (1881) Bulletin de la Société française de Minéralogie: 4: 89.

Frenzel (1894) Mineralogische und petrographische Mitteilungen, Vienna: 14: 121.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 133.

Goldschmidt, V. (1922) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 8: 37.

Russell (1927) Mineralogical Magazine: 21: 386.

Chukhrov (1945) Comptes rendus de l’académie des sciences de l’U.R.S.S., n.s.: 45: 370.

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.: 592-593.

American Mineralogist (1969): 54: 328.

Doklady Akademii Nauk SSSR (1981): 256: 1222.

Krause, W. & Täuber, H. (1992): Zum Kenntnisstand der Minerale Serpierit, Orthoserpierit und Devillin. Aufschluss 43, 1-25. (in German)

Gaines, Richard V., H. Catherine, W. Skinner, Eugene E. Foord, Brian Mason, Abraham Rosenzweig (1997), Dana's New Mineralogy : The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana: 647.

Sabelli, C.; Zanazzi, P. F. (1968): Crystal structure of serpierite. Acta Crystallographica, B24, 1214-1221.

Internet Links for Serpierite

Localities for Serpierite

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.
Mineral and/or Locality  
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