Pitticite Mineral Data

General Pitticite Information

Chemical Formula:

Hydrous ferric arsenate sulfate (Fe, AsO4, SO4, H2O)

Composition:

Molecular Weight = 364.69 gm

Iron 30.63 % Fe 43.79 % Fe₂O₃

Arsenic 20.54 % As 31.51 % As₂O₅

Hydrogen 0.55 % H 4.94 % H₂O

Sulfur 8.79 % S 21.95 % SO₃

Oxygen 39.48 % O

______ ______

100.00 % 102.19 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺₂(AsO₄)(SO₄)•(H₂O)

Environment:

Late secondary mineral formed by oxidation of earlier arsenic-bearing species, may be deposited by mine and spring waters.

IMA Status:

Valid Species (Pre-IMA) 1813

Locality:

Frieber, Schneeberg, Schwarzenberg, Johanngeorgenstadt, Marienber, and other districts in Saxony, Germany. Link to MinDat.org Location Data.

Name Origin:

From the Greek for "pitch", for its typical resinous appearance.

Name Pronunciation:

Pitticite + Pronunciation

Pitticite Image

Images:

Pitticite

Comments: Dark brown to orange-brown massive Pitticite.
Location: Graul, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Pitticite Crystallography

Crystal System:

Amorphous- No Crystals

Physical Properties of Pitticite

Cleavage:

None

Color:

Gray, Gray white, Yellow, Yellow brown, White.

Density:

2.5

Diaphaneity:

Transparent to Opaque

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Reniform - "Kidney like" in shape (e.g.. hematite).

Hardness:

2-3 - Gypsum-Calcite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Greasy

Streak:

yellow white

Optical Properties of Pitticite

Gladstone-Dale:

CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2491,KC= 0.2446
Ncalc = 1.61

Optical Data:

Biaxial (?), a=1.61-1.63, b=1.616-1.635,

Calculated Properties of Pitticite

Electron Density:

Bulk Density (Electron Density)=2.40 gm/cc
note: Specific Gravity of Pitticite =2.50 gm/cc.

Fermion Index:

Fermion Index = 0.0073427084
Boson Index = 0.9926572916

Photoelectric:

PE_Pitticite= 23.71 barns/electron
U=PE_Pitticite x rElectron Density= 56.88 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pitticite is Not Radioactive

Pitticite Classification

Dana Class:

43.05.03.01 (43)Compound Phosphates, etc.

(43.05)(Hydrated Compound Anions With Hydroxyl or Halogen)

(43.05.03)Pitticite Group

43.05.03.01 Pitticite Hydrousferricarsenatesulfate(Fe,AsO4,SO4,H2O) None

43.05.03.02 Zykaite Fe4(AsO4)3(SO4)(OH)•15(H2O) Unk Ortho

Strunz Class:

08.DB.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DB -With only medium-sized cations, (OH, etc.):RO4 < 1:1

08.DB.05 Diadochite Fe2(PO4)(SO4)(OH)•6(H2O) P1 1

08.DB.05 Pitticite Hydrousferricarsenatesulfate(Fe,AsO4,SO4,H2O) None

Other Pitticite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Dana) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Pitticite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Pitticite Specimen Label here :

Pitticite

Hydrous ferric arsenate sulfate (Fe, AsO4, SO4, H2O)
Dana No: 43.05.03.01 Strunz No: 08.DB.05
Locality:

Notes: