Sarkinite Mineral Data

Sarkinite Mineral Data +

General Sarkinite Information

Chemical Formula:

Mn++2(AsO4)(OH)

Composition:

Molecular Weight = 265.80 gm

Manganese 41.34 % Mn 53.38 % MnO

Arsenic 28.19 % As 43.24 % As₂O₅

Hydrogen 0.38 % H 3.39 % H₂O

Oxygen 30.10 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺₂(AsO₄)(OH)

Environment:

As analog of triploidite.

IMA Status:

Valid Species (Pre-IMA) 1885

Locality:

Hartigen mine, Pajsberg, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek for "made of flesh" in allusion to the blood-red color.

Synonym:

ICSD 4285

PDF 14-214

Sarkinite Image

Images:

Sarkinite

Comments: Reddish brown crystalline aggregates of sarkinite on matrix.
Location: Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Sarkinite Crystallography

Axial Ratios:

a:b:c =0.9364:1:0.7511

Cell Dimensions:

a = 12.68, b = 13.54, c = 10.17, Z = 16; beta = 108.733° V = 1,653.56 Den(Calc)= 4.27

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): 3.04(1), 3.17(1), 3.29(0.7),

Forms:

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Forms: [ 0 2 1] [ 1 2 0] [ 1 4 1] [ 1 0 1] [ 1 0 0] [ 0 0 1]

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Crystal Structure:

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Dal Negro A , Giuseppetti G , Pozas J M M , Tschermaks Mineralogische und Petrographische Mitteilungen , 21 (1974) p.246-260, The crystal structure of sarkinite, Mn2AsO4(OH)

Physical Properties of Sarkinite

Cleavage:

[100] Distinct

Color:

Yellow, Dark red, Reddish yellow.

Density:

4.08 - 4.18, Average = 4.13

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

4-5 - Fluorite-Apatite

Luster:

Greasy (Oily)

Streak:

yellow

Optical Properties of Sarkinite

Gladstone-Dale:

CI meas= -0.041 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1881,KPDmeas= 0.1944,KC= 0.1867

Optical Data:

Biaxial (-), a=1.793, b=1.807, g=1.809, bire=0.0160, 2V(Calc)=40, 2V(Meas)=83.

Calculated Properties of Sarkinite

Electron Density:

r_electron=3.98 gm/cc
note: r_Sarkinite=4.27 gm/cc.

Fermion Index

Fermion Index = 0.00014
Boson Index = 0.99986

Photoelectric:

PE_Sarkinite= 30.49 barns/electron
U=PE_Sarkinite x r_electron= 121.49 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Sarkinite is Not Radioactive

Sarkinite Classification

Dana Class:

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

(41.6)where (A)2 (XO4) Zq

(41.6.3)Dana Group

41.6.3.1 Wolfeite (Fe,Mn)2(PO4)(OH) P 2₁/a 2/m

41.6.3.2 Triploidite (Mn,Fe)2(PO4)(OH) P 2₁/a 2/m

41.6.3.3 Sarkinite Mn2(AsO4)(OH) P 2₁/a 2/m

41.6.3.4 Stanekite! Fe(Mn,Fe,Mg)(PO4)O P 2₁/a 2/m

41.6.3.5 IMA2004-009! Mg2(PO4)(OH) P 2₁/c 2/m

Strunz Class:

VII/B.03-70 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.03 - Wagnerite - Sarkinite series

VII/B.03-10 Wagnerite (Mg,Fe)2(PO4)F P 2₁/a 2/m

VII/B.03-20 Magniotriplite? (Mg,Fe,Mn)2(PO4)F P 2₁/a 2/m

VII/B.03-30 Zwieselite (Fe,Mn)2(PO4)F I2/a 2/m

VII/B.03-40 Triplite (Mn,Fe,Mg,Ca)2(PO4)(F,OH) I2/m 2/m

VII/B.03-50 Wolfeite (Fe,Mn)2(PO4)(OH) P 2₁/a 2/m

VII/B.03-60 Triploidite (Mn,Fe)2(PO4)(OH) P 2₁/a 2/m

VII/B.03-65 Stanekite! Fe(Mn,Fe,Mg)(PO4)O P 2₁/a 2/m

VII/B.03-70 Sarkinite Mn2(AsO4)(OH) P 2₁/a 2/m

Other Sarkinite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Sarkinite

Mn++2(AsO4)(OH)
Dana No: 41.6.3.3 Strunz No: VII/B.03-70
Locality:

Notes: