Sailaufite Mineral Data

Sailaufite Mineral Data

General Sailaufite Information

Chemical Formula:

Ca2Mn3O2(AsO4)2(CO3)·3(H2O)

Composition:

Molecular Weight = 650.52 gm

Sodium 1.41 % Na 1.91 % Na₂O

Calcium 8.63 % Ca 12.07 % CaO

Manganese 23.65 % Mn 33.98 % Mn₂O₃

Arsenic 24.19 % As 37.10 % As₂O₅

Hydrogen 0.93 % H 8.31 % H₂O

Carbon 1.85 % C 6.77 % CO₂

Oxygen 39.35 % O

______ ______

100.00 % 100.12 % = TOTAL OXIDE

Empirical Formula:

Ca_1.4Na_0.4Mn³⁺_2.8As_2.1O₁₀(CO₃)·3(H₂O)

Environment:

Late-stage hydrothermal product in veins of Mn ore in a rhyolite. (Mitridatite type)

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Hartkoppe hill, Ober-Sailauf (Spessart mountains) Germany. Link to MinDat.org Location Data.

Name Origin:

Named for the locality

Synonym:

IMA2000-005

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Sailaufite Crystallography

Axial Ratios:

a:b:c =0.5733:1:0.455

Cell Dimensions:

a = 11.253, b = 19.628, c = 8.932, Z = 6; beta = 100.05° V = 1,942.57 Den(Calc)= 3.34

Crystal System:

Monoclinic - DomaticH-M Symbol (m) Space Group: Cm

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

By Intensity(I/I_o): 8.796(1)(001), 2.9342(0.75)(003), 2.2016(0.55)(004),2.7702(0.36)(400), 5.6524(0.31)(130), 2.816(0.24), 2.886(0.23),

Crystal Structure:

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Wildner M , Tillmanns E , Andrut M , Lorenz J , European Journal of Mineralogy , 15 (2003) p.555-564

Physical Properties of Sailaufite

Cleavage:

[001] Perfect

Color:

Dark red brown, Black.

Diaphaniety:

Translucent

Fracture:

Brittle - Subconchoidal - Brittle frature with subconchoidal fragments

Habit:

Mammillary - Larger "breast-like" rounded forms resembling botryoidal (e.g. malachite).

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3.5 - Copper Penny

Luster:

Vitreous (Glassy)

Streak:

brown

Optical Properties of Sailaufite

Gladstone-Dale:

CI calc= -0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2352,KC= 0.2339

Optical Data:

Biaxial (-), a=1.757, b=1.8, g=1.8, bire=0.0430

Calculated Properties of Sailaufite

Electron Density:

r_electron=3.20 gm/cc
note: r_Sailaufite=3.34 gm/cc.

Fermion Index

Fermion Index = 0.0005
Boson Index = 0.9995

Photoelectric:

PE_Sailaufite= 23.62 barns/electron
U=PE_Sailaufite x r_electron= 75.60 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Sailaufite is Not Radioactive

Sailaufite Classification

Dana Class:

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

(42.8)where (AB)7 (XO4)4 Zq · x(H2O)

(42.8.5)Dana Group

42.8.5.1 Kolfanite Ca2Fe3O2(AsO4)3·2(H2O) A2/a 2/m

42.8.5.2 Pararobertsite Ca2Mn3(PO4)3O2·3(H2O) P 2₁/c 2/m

42.8.5.3 Sailaufite ! Ca2Mn3O2(AsO4)2(CO3)·3(H2O) Cm m

Strunz Class:

VII/D.30-45 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.30 - Mitridatite series

VII/D.30-10 Xanthoxenite Ca4Fe2(PO4)4(OH)2·3(H2O) P1 1

VII/D.30-20 Kolfanite Ca2Fe3O2(AsO4)3·2(H2O) A2/a 2/m

VII/D.30-30 Mitridatite Ca2Fe3(PO4)3O2·3(H2O) A2/a 2/m

VII/D.30-40 Arseniosiderite Ca2Fe3(AsO4)3O2·3(H2O) A2/a 2/m

VII/D.30-45 Sailaufite Ca2Mn3O2(AsO4)2(CO3)·3(H2O) Cm m

VII/D.30-50 Robertsite Ca6Mn9(PO4)9O6(H2O)6·3(H2O) A2/a 2/m

VII/D.30-60 Pararobertsite Ca2Mn3(PO4)3O2·3(H2O) P 2₁/c 2/m

Other Sailaufite Information

References:

NAME( AmMin, v 88, p 250) PHYS. PROP.(AmMin, v 88, p 250) OPTIC PROP.(AmMin, v 88, p 250)

See Also:

Links to other databases for Sailaufite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Sailaufite

Ca2Mn3O2(AsO4)2(CO3)·3(H2O)
Dana No: 42.8.5.3 Strunz No: VII/D.30-45
Locality:

Notes: