Reichenbachite Mineral Data

Reichenbachite Mineral Data +

General Reichenbachite Information

Chemical Formula:

Cu++5(PO4)2(OH)4

Composition:

Molecular Weight = 575.70 gm

Copper 55.19 % Cu 69.09 % CuO

Phosphorus 10.76 % P 24.66 % P₂O₅

Hydrogen 0.70 % H 6.26 % H₂O

Oxygen 33.35 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₅(PO₄)₂(OH)₄

Environment:

Silicified barite vein. Trimorphous with pseudomalachite and ludjibaite.

IMA Status:

Approved IMA 1984

Locality:

Reichenbach, Odenwald, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 100019

PDF 40-502

Reichenbachite Image

Images:

Reichenbachite

Comments: Green crystals of reichenbachite on quartz.
Location: Bergen, near Falkenstein, Vogtland, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Reichenbachite Crystallography

Axial Ratios:

a:b:c =0.8603:1:0.4186

Cell Dimensions:

a = 9.198, b = 10.691, c = 4.476, Z = 2; beta = 92.42° V = 439.76 Den(Calc)= 4.35

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.41(1), 4.47(1), 3.132(0.3),

Physical Properties of Reichenbachite

Cleavage:

None

Color:

Dark green.

Density:

4.35

Diaphaniety:

Translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Hardness:

3.5 - Copper Penny

Luster:

Vitreous (Glassy)

Streak:

light green

Optical Properties of Reichenbachite

Gladstone-Dale:

CI meas= -0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1902,KPDmeas= 0.1902,KC= 0.1838

Optical Data:

Biaxial (-), a=1.782, b=1.833, g=1.867, bire=0.0850, 2V(Calc)=76, 2V(Meas)=76.3.

Calculated Properties of Reichenbachite

Electron Density:

r_electron=4.16 gm/cc
note: r_{Reichenbachite}=4.35 gm/cc.

Fermion Index

Fermion Index = 0.00016
Boson Index = 0.99984

Photoelectric:

PE_{Reichenbachite}= 24.87 barns/electron
U=PE_{Reichenbachite} x r_electron= 103.34 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Reichenbachite is Not Radioactive

Reichenbachite Classification

Dana Class:

41.4.3.2 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.4)where (A B)5 (XO4)2 Zq

(41.4.3)Dana Group

41.4.3.1 Pseudomalachite Cu5(PO4)2(OH)4 P 2₁/a 2/m

41.4.3.2 Reichenbachite Cu5(PO4)2(OH)4 P 2₁/a 2/m

41.4.3.3 Ludjibaite Cu5(PO4)2(OH)4 P1 1

Strunz Class:

VII/B.11-30 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds

VII/B.11 - Pseudomalachite group, Ludjibaite - Reppiaite series

VII/B.11-10 Ludjibaite Cu5(PO4)2(OH)4 P1 1

VII/B.11-20 Pseudomalachite Cu5(PO4)2(OH)4 P 2₁/a 2/m

VII/B.11-30 Reichenbachite Cu5(PO4)2(OH)4 P 2₁/a 2/m

VII/B.11-40 Cornwallite Cu5(AsO4)2(OH)4 P 2₁/a 2/m

VII/B.11-50 Cornubite Cu5(AsO4)2(OH)4 P1 1

VII/B.11-60 Turanite Cu5(VO4)2(OH)4 P1 1

VII/B.11-65 Gatehouseite Mn5(PO4)2(OH)4 P 2₁2₁2₁ 2 2 2

VII/B.11-70 Arsenoclasite Mn5(AsO4)2(OH)4 P 2₁2₁2₁ 2 2 2

VII/B.11-80 Reppiaite Mn5[(V,As)O4]2(OH)4 C 2/m 2/m

Other Reichenbachite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.72,p404-408,1987) OPTIC PROP.(Am.Min.,Vol.72,p404-408,1987)

See Also:

Links to other databases for Reichenbachite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Reichenbachite

Cu++5(PO4)2(OH)4
Dana No: 41.4.3.2 Strunz No: VII/B.11-30
Locality:

Notes: