Richelsdorfite Mineral Data

Richelsdorfite Mineral Data +

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General Richelsdorfite Information

Chemical Formula:

Ca2Cu5Sb(AsO4)4Cl(OH)6·6(H2O)

Composition:

Molecular Weight = 1,320.90 gm

Calcium 6.07 % Ca 8.49 % CaO

Copper 24.05 % Cu 27.08 % Cu₂O

Antimony 9.22 % Sb 11.03 % Sb₂O₃

Arsenic 22.69 % As 34.80 % As₂O₅

Hydrogen 1.37 % H 12.27 % H₂O

Chlorine 2.68 % Cl 2.68 % Cl

- % Cl -0.61 % -O=Cl₂

Oxygen 33.91 % O

______ ______

100.00 % 95.76 % = TOTAL OXIDE

Empirical Formula:

Ca₂Cu₅Sb(AsO₄)₄Cl(OH)₆·6(H₂O)

Environment:

Found in Permian-aged sandstone at the type locality.

IMA Status:

Approved IMA 1983

Locality:

Richelsdorf Mountains, Hesse, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 62339

PDF 46-1462

Richelsdorfite Image

Images:

Richelsdorfite

Comments: Greenish rounded aggregates of richelsdorfite on matrix.
Location: Wilhelm Mine; Wechselschacht, near Bauhaus, Richelsdorf District, Hesse, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Richelsdorfite Crystallography

Axial Ratios:

a:b:c =0.9909:1:0.9495

Cell Dimensions:

a = 14.078, b = 14.207, c = 13.49, Z = 4; beta = 101.06° V = 2,647.97 Den(Calc)= 3.31

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 13.29(1), 3.132(0.9), 2.776(0.35),

Physical Properties of Richelsdorfite

Cleavage:

[001] Perfect

Color:

Sky blue, Turquoise.

Density:

3.2 - 3.3, Average = 3.25

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

greenish blue

Optical Properties of Richelsdorfite

Gladstone-Dale:

CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.204,KPDmeas= 0.2078,KC= 0.2102

Optical Data:

Biaxial (-), a=1.64, b=1.692, g=1.694, bire=0.0540, 2V(Calc)=20, 2V(Meas)=10-15.

Calculated Properties of Richelsdorfite

Electron Density:

r_electron=3.09 gm/cc
note: r_{Richelsdorfite}=3.25 gm/cc.

Fermion Index

Fermion Index = 0.00024
Boson Index = 0.99976

Photoelectric:

PE_{Richelsdorfite}= 55.70 barns/electron
U=PE_{Richelsdorfite} x r_electron= 171.86 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Richelsdorfite is Not Radioactive

Richelsdorfite Classification

Dana Class:

42.7.15.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.7)where (AB)5 (XO4)3 Zq · x(H2O)

(42.7.15)Dana Group

42.7.15.1 Richelsdorfite Ca2Cu5Sb(AsO4)4Cl(OH)6·6(H2O) C 2/m 2/m

42.7.15.2 Bleasdaleite! (Ca,Fe)2Cu5(Bi,Cu)(PO4)4(H2O,OH,Cl)13 C 2/m 2/m

Strunz Class:

VII/D.54-10 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K

VII/D.54 - Richelsdorfite - Clinotyrolite series

VII/D.54-05 Bleasdaleite! (Ca,Fe)2Cu5(Bi,Cu)(PO4)4(H2O,OH,Cl)13 C 2/m 2/m

VII/D.54-10 Richelsdorfite Ca2Cu5Sb(AsO4)4Cl(OH)6·6(H2O) C 2/m 2/m

VII/D.54-20 Tyrolite CaCu5(AsO4)2(CO3)(OH)4·6(H2O) Pmma 2/m 2/m 2/m

VII/D.54-30 Clinotyrolite Ca2Cu9[(As,S)O4]4(OH)10·10(H2O) P 2/a 2/m

Other Richelsdorfite Information

References:

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

See Also:

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

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Richelsdorfite

Ca2Cu5Sb(AsO4)4Cl(OH)6·6(H2O)
Dana No: 42.7.15.1 Strunz No: VII/D.54-10
Locality:

Notes: