Caryopilite Mineral Data

Caryopilite Mineral Data +

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General Caryopilite Information

Chemical Formula:

(Mn++,Mg,Zn,Fe++)3(Si,As)2O510(OH,Cl)4

Composition:

Molecular Weight = 373.76 gm

Magnesium 3.25 % Mg 5.39 % MgO

Manganese 29.40 % Mn 37.96 % MnO

Zinc 5.25 % Zn 6.53 % ZnO

Iron 2.99 % Fe 3.84 % FeO

Silicon 13.53 % Si 28.94 % SiO₂

Arsenic 4.01 % As 5.29 % As₂O₃

Hydrogen 0.97 % H 8.68 % H₂O

Chlorine 3.79 % Cl 3.79 % Cl

- % Cl -0.86 % -O=Cl₂

Oxygen 36.81 % O

______ ______

100.00 % 99.57 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺₂Mg_0.5Zn_0.3Fe²⁺_0.2Si_1.8As_0.2O₅(OH)_3.6Cl_0.4

Environment:

Forms as an alteration product of primary manganese silicates such as rhodonite.

IMA Status:

Valid Species (Pre-IMA) 1889

Locality:

Harstig mine, Pajsberg, Varmland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek for "nut" and "felt," in allusion to its brown color and felted structure.

Caryopilite Image

Images:

Caryopilite

Comments: Small white balls of caryopilite next to larger barite crystals.
Location: Langban, Varmland, Sweden. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Caryopilite Crystallography

Axial Ratios:

a:b:c =0.5777:1:0.7672

Cell Dimensions:

a = 5.668, b = 9.811, c = 7.527, Z = 2; beta = 104.52° V = 405.20 Den(Calc)= 3.06

Crystal System:

MonoclinicSpace Group: Cm or C 2/m

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

By Intensity(I/I_o): 7.3(1), 2.51(0.9), 2.81(0.7),

Physical Properties of Caryopilite

Cleavage:

[001] Good

Color:

Reddish brown, Yellow, Greenish brown, Orange brown.

Density:

2.87

Diaphaniety:

Subtransparent

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Pseudo Hexagonal - Crystals show a hexagonal outline.

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous (Glassy)

Streak:

light brown

Optical Properties of Caryopilite

Gladstone-Dale:

CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2064,KPDmeas= 0.2201,KC= 0.2172

Optical Data:

Biaxial (-), a=1.606-1.62, b=1.632-1.65, g=1.632-1.65, bire=0.0260-0.0300, 2V(Calc)=0, 2V(Meas)=0. Dispersion weak.

Calculated Properties of Caryopilite

Electron Density:

r_electron=2.78 gm/cc
note: r_Caryopilite=2.87 gm/cc.

Fermion Index

Fermion Index = 0.01253
Boson Index = 0.98747

Photoelectric:

PE_Caryopilite= 14.52 barns/electron
U=PE_Caryopilite x r_electron= 40.42 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Caryopilite is Not Radioactive

Caryopilite Classification

Dana Class:

71.1.2b.1 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.1)with 1:1 layers

(71.1.2b)Serpentine group (Lizardite subgroup)

71.1.2b.1 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono

71.1.2b.2 Lizardite Mg3Si2O5(OH)4 P1 1

71.1.2b.3 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2

71.1.2b.4 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono

Strunz Class:

VIII/H.27-55 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups

VIII/H.27 - Serpentine group

VIII/H.27-10 Antigorite (Mg,Fe)3Si2O5(OH)4 Cm m

VIII/H.27-20 Lizardite Mg3Si2O5(OH)4 P1 1

VIII/H.27-30 Clinochrysotile Mg3Si2O5(OH)4 Cc, C 2/m Mono

VIII/H.27-40 Orthochrysotile Mg3Si2O5(OH)4 Unk Ortho

VIII/H.27-50 Parachrysotile Mg3Si2O5(OH)4 Unk Ortho

VIII/H.27-55 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono

VIII/H.27-60 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono

VIII/H.27-70 Berthierine (Fe,Fe,Al,Mg)2-3(Si,Al)2O5(OH)4 Cm m

VIII/H.27-80 Fraipontite (Zn,Al)3(Si,Al)2O5(OH)4 Cm m

VIII/H.27-90 Zinalsite Zn2AlSi2O5(OH)4·2(H2O)(?) Mono

VIII/H.27-95 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m

VIII/H.27-100 Amesite Mg2Al(SiAl)O5(OH)4 C1 1

VIII/H.27-110 Kellyite (Mn,Mg,Al)3(Si,Al)2O5(OH)4 P 6₃ 6

VIII/H.27-120 Cronstedtite Fe2Fe(SiFe)O5(OH)4 P 3₁m 3m

VIII/H.27-140 Karpinskite (Mg,Ni)2Si2O5(OH)2(?) Unk Mono

VIII/H.27-150 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2

VIII/H.27-160 Pecoraite Ni3Si2O5(OH)4 C 2/m 2/m

VIII/H.27-170 Brindleyite (Ni,Mg,Fe)2Al(SiAl)O5(OH)4 C 2 2

VIII/H.27-180 Maufite (Mg,Ni)Al4Si3O13·4(H2O)(?) Mono ? Mono

VIII/H.27-190 Carlosturanite (Mg,Fe,Ti,Mn)21(Si,Al)12O28(OH)34 Cm m

Other Caryopilite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

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Caryopilite

(Mn++,Mg,Zn,Fe++)3(Si,As)2O510(OH,Cl)4
Dana No: 71.1.2b.1 Strunz No: VIII/H.27-55
Locality:

Notes: