Truscottite Mineral Data

Truscottite Mineral Data +

[Express Minerals] [Minerals for Sale] [About Us] [En EspaÃƒï¿½Ã‚Â±ol] [Mineral Gallery]
Fabre Minerals - Europe's first Internet mineral dealer, on the web since 1996

General Truscottite Information

Chemical Formula:

(Ca,Mn++)14Si24O58(OH)8·2(H2O)

Composition:

Molecular Weight = 2,364.92 gm

Calcium 20.34 % Ca 28.45 % CaO

Manganese 4.65 % Mn 6.00 % MnO

Silicon 28.50 % Si 60.98 % SiO₂

Hydrogen 0.51 % H 4.57 % H₂O

Oxygen 46.00 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₁₂Mn²⁺₂Si₂₄O₅₈(OH)₈·2(H₂O)

Environment:

Hydrothermal deposits.

IMA Status:

Valid Species (Pre-IMA) 1914

Locality:

Lelong Donok gold mine, Benkeelen, Sumatra, Indonesia. Link to MinDat.org Location Data.

Name Origin:

Named for Samuel John Truscott (1970-1950), English mining geologist.

Truscottite Image

Images:

Truscottite

Comments: Whitish pearly scaly massive truscottite.
Location: Lebong Donok Mine, Benkeelen, Sumatra Island, Indonesia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Truscottite Crystallography

Axial Ratios:

a:c = 1:1.93566

Cell Dimensions:

a = 9.731, c = 18.836, Z = 1; V = 1,544.67 Den(Calc)= 2.54

Crystal System:

TrigonalSpace Group: p3 or p3

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

By Intensity(I/I_o): 3.141(1), 2.84(0.8), 4.21(0.7),

Physical Properties of Truscottite

Cleavage:

[0001] Perfect

Color:

White.

Density:

2.35

Diaphaniety:

Transparent to translucent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Micaceous - Platy texture with "flexible" plates.

Habit:

Spherical - Spherical, rounded aggregates.

Luster:

Pearly

Streak:

white

Optical Properties of Truscottite

Gladstone-Dale:

CI meas= -0.076 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.213,KPDmeas= 0.2302,KC= 0.2139

Optical Data:

Uniaxial (-), e=1.552, w=1.53, bire=0.0220.

Calculated Properties of Truscottite

Electron Density:

r_electron=2.54 gm/cc
note: r_Truscottite=2.54 gm/cc.

Fermion Index

Fermion Index = 0.0138
Boson Index = 0.9862

Photoelectric:

PE_Truscottite= 4.75 barns/electron
U=PE_Truscottite x r_electron= 12.05 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Truscottite is Not Radioactive

Truscottite Classification

Dana Class:

73.2.2a.2 (73)Phyllosilicate Condensed Tetrahedral Sheets

(73.2)with double and single layers

(73.2.2a)Reyerite group (Reyerite Subgroup)

73.2.2a.1 Reyerite (Na,K)4Ca14Si22Al2O58(OH)8·6(H2O) P 3 3

73.2.2a.2 Truscottite (Ca,Mn)14Si24O58(OH)8·2(H2O) p3 or p3 Trig

Strunz Class:

VIII/H.34-20 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica minerals with other simple layers, [Si6O15]6- and others

VIII/H.34 - Gyrolite series

VIII/H.34-10 Minehillite (K,Na)2-3Ca28(Zn4Al4Si40)O112(OH)16 P 6₃/mmm, P 62c, or P 6₃mc Hex

VIII/H.34-20 Truscottite (Ca,Mn)14Si24O58(OH)8·2(H2O) p3 or p3 Trig

VIII/H.34-25 Orlymanite Ca4Mn3Si8O20(OH)6·2(H2O) P 3-,P 3 Trig

VIII/H.34-28 Fedorite KNa4Ca4(Al,Si)16O36(OH,F)4·6(H2O) C1 1

VIII/H.34-30 Reyerite (Na,K)4Ca14Si22Al2O58(OH)8·6(H2O) P 3 3

VIII/H.34-40 Gyrolite NaCa16Si23AlO60(OH)8·64(H2O) P 6₁ 6

VIII/H.34-45 Tungusite Ca14(OH)8(Si8O20)3Fe9(OH)14 P1 1

VIII/H.34-50 Zeophyllite Ca4Si3O8(OH,F)4·2(H2O) R 3 3

VIII/H.34-70 Armstrongite CaZrSi6O15·3(H2O) C 2 2

Other Truscottite Information

References:

NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

Search for Truscottite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Truscottite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Truscottite Mineral Data :

Ask about Truscottite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Truscottite Specimen Label here :

Truscottite

(Ca,Mn++)14Si24O58(OH)8·2(H2O)
Dana No: 73.2.2a.2 Strunz No: VIII/H.34-20
Locality:

Notes: