Grumantite Mineral Data

Grumantite Mineral Data +

[Newest Minerals] [Minerals for Sale] [Tsumeb Mine] [Mineral Auctions] [Mineral Gallery]
The Mineral Gallery's Exceptional Specimens and Mineral Hall of Fame
Visa and Mastercard are Welcome

General Grumantite Information

Chemical Formula:

NaHSi2O5·(H2O)

Composition:

Molecular Weight = 178.18 gm

Sodium 12.90 % Na 17.39 % Na₂O

Silicon 31.52 % Si 67.44 % SiO₂

Hydrogen 1.70 % H 15.17 % H₂O

Oxygen 53.88 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaHSi₂O₅·(H₂O)

Environment:

Found as fine-grained compact veins with ussingite margins.

IMA Status:

Approved IMA 1987

Locality:

Mt. Alluaiev, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named from the old Russian name for the Spitzbergen Archipelago, Arctic Ocean.

Synonym:

ICSD 39749

PDF 42-1331

Search for Grumantite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Grumantite Crystallography

Axial Ratios:

a:b:c =0.8755:1:0.3923

Cell Dimensions:

a = 15.979, b = 18.25, c = 7.16, Z = 16; V = 2,087.98 Den(Calc)= 2.27

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: F dd2

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

By Intensity(I/I_o): 3.006(1), 3.505(1), 6.2(1),

Physical Properties of Grumantite

Cleavage:

[110] Perfect

Color:

White, Snow white.

Density:

2.21

Diaphaniety:

Transparent to Translucent

Habit:

Compact - Occurs as a compact mass.

Hardness:

4-5 - Fluorite-Apatite

Luminescence:

Fluorescent, Short UV=weak bluish white.

Luster:

Vitreous - Silky

Streak:

white

Optical Properties of Grumantite

Gladstone-Dale:

CI meas= -0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2238,KPDmeas= 0.2299,KC= 0.2249

Optical Data:

Biaxial (+), a=1.494, b=1.507, g=1.523, bire=0.0290, 2V(Calc)=86, 2V(Meas)=85. Dispersion weak, r > v.

Calculated Properties of Grumantite

Electron Density:

r_electron=2.29 gm/cc
note: r_Grumantite=2.27 gm/cc.

Fermion Index

Fermion Index = 0.01498
Boson Index = 0.98502

Photoelectric:

PE_Grumantite= 1.45 barns/electron
U=PE_Grumantite x r_electron= 3.32 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Grumantite is Not Radioactive

Grumantite Classification

Dana Class:

78.4.5.1 (78)Unclassified silicates

(78.4)possible inosilicates

(78.4.5)Dana Group

78.4.5.1 Grumantite NaHSi2O5·(H2O) F dd2 mm2

Strunz Class:

VIII/F.36-02 VIII - Silicates

VIII/F - Inosilicates (chain and band) complex chain structure. Cylindric chains and others

VIII/F.36 - Caysichite-(Y) - Tadzhikite-(Ce) series

VIII/F.36-02 Grumantite NaHSi2O5·(H2O) F dd2 mm2

VIII/F.36-05 Caysichite-(Y) Y2(Ca,Gd)2Si4O10(CO3)3(H2O,O,OH)·3H20 Ccm21 mm2

VIII/F.36-10 Hellandite-(Y) (Ca,REE)4(Y,Ce)2(Al,[])2[Si4B4O22](OH)2 P 2/a 2/m

VIII/F.36-15 Hellandite-(Ce)! (Ca3REE)4Ce2Al[]2[Si4B4O22](OH)2 P 2/a 2/m

VIII/F.36-20 Tadzhikite-(Ce) Ca4(Ce,Y)2(Ti,Al,Fe,[])2[Si4B4O22](OH)2 P 2/a 2/m

VIII/F.36-25 Tadzhikite-(Y)! Ca4(Y,Ce)2(Ti,Al,Fe,[])2[Si4B4O22](OH)2 P 2/a 2/m

VIII/F.36-30 Mottanaite-(Ce)! Ca4(Ce,Ca)2AlBe2[Si4B4O22]O2 P 2/a 2/m

VIII/F.36-40 Ciprianiite! Ca4[(Th,U)(REE)]2(Al,[])2[Si4B4O22](OH,F)2 P 2/a 2/m

VIII/F.36-60 Ashcroftine-(Y) K5Na5(Y,Ca)12Si28O70(OH)2(CO3)8·8(H2O) I 4/mmm 4/m 2/m 2/m

Other Grumantite Information

References:

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

Search for Grumantite using:

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

Visit our Advertisers for Grumantite :
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 Grumantite Mineral Data :

Ask about Grumantite 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 Grumantite Specimen Label here :

Grumantite

NaHSi2O5·(H2O)
Dana No: 78.4.5.1 Strunz No: VIII/F.36-02
Locality:

Notes: