Denisovite Mineral Data (original) (raw)

General Denisovite Information

Help on Chemical Formula: Chemical Formula:

(K,Na)Ca2Si3O8(F,OH)

Help on Composition: Composition:

Molecular Weight = 345.98 gm

Potassium 8.48 % K 10.21 % K2O

Sodium 1.66 % Na 2.24 % Na2O

Calcium 23.17 % Ca 32.42 % CaO

Silicon 24.35 % Si 52.10 % SiO2

Hydrogen 0.07 % H 0.65 % H2O

Oxygen 38.15 % O

Fluorine 4.12 % F 4.12 % F

- % F -1.73 % -O=F2

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

K0.75Na0.25Ca2Si3O8F0.75(OH)0.25

Help on Environment: Environment:

In nepheline syenite in a di�erentiated alkalic massif.

Help on IMA Status: IMA Status:

Approved IMA 1984

Help on Locality: Locality:

Mts. Eveslogchorr and Yukspor, Khibiny massif, Kola Peninsula, and in the Murun massif, southwest of Olekminsk, Yakutia, Russia. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Aleksander Petrovich Denisov (1918-1972), Russian specialist in X-ray investigations of minerals, of the Kola Scientific Center, Russia.

Help on Name Pronunciation: Name Pronunciation:

Denisovite + Pronunciation Say DENISOVITE

Denisovite Image

Click Here for Larger Denisovite Image in a New Browser Window Images:

Click Here for Larger Denisovite Image Denisovite Comments: Grayish-white fibrous denisovite. Location: Eveslogchorr Mt , Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia.Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag

Denisovite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =4.2944:1:2.5375

Help on Cell Dimensions: Cell Dimensions:

a = 30.92, b = 7.2, c = 18.27, Z = 20; beta = 95° V = 4,051.86 Den(Calc)= 2.84

Help on Crystal System: Crystal System:

Monoclinic

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.75(1), 3.32(1), 3.03(0.9),

Physical Properties of Denisovite

Help on Cleavage: Cleavage:

{???} Indistinct

Help on Color: Color:

Greenish gray, Gray.

Help on Density: Density:

2.76

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Hardness: Hardness:

4-5 - Fluorite-Apatite

Help on Luster: Luster:

Pearly

Help on Streak: Streak:

gray white

Optical Properties of Denisovite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2008,KPDmeas= 0.2066,KC= 0.2049
Ncalc = 1.57 - 1.58

Help on Optical Data: Optical Data:

Biaxial (+), a=1.567, b=1.568, g=1.576, bire=0.0090

Calculated Properties of Denisovite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.74 gm/cc
note: Specific Gravity of Denisovite =2.76 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Help on Photoelectric: Photoelectric:

PEDenisovite = 4.67 barns/electron
U=PEDenisovite x relectron= 12.83 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 121.59 (Gamma Ray American Petroleum Institute Units)
Concentration of Denisovite per GRapi unit = 0.82 (%)

Estimated Radioactivity from Denisovite - barely detectable

Denisovite Classification

Help on Dana Class: Dana Class:

65.02.01.07 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.02)with chains P=3

(65.02.01)Wollastonite group

65.02.01.01a Wollastonite-1A CaSiO3 P1 1

65.02.01.01b Wollastonite-2M* CaSiO3 P 21 2

65.02.01.01c Wollastonite-3A-4A-5A-7A* CaSiO3 P1 1

65.02.01.02 Bustamite (Mn,Ca)3Si3O9 P1 1

65.02.01.03 Ferrobustamite Ca(Fe,Ca,Mn)Si2O6 P1 1

65.02.01.04 Pectolite NaCa2Si3O8(OH) P1 1

65.02.01.05 Serandite Na(Mn,Ca)2Si3O8(OH) P1 1

65.02.01.06 Cascandite Ca(Sc,Fe)Si3O8(OH) C1 1

65.02.01.07 Denisovite (K,Na)Ca2Si3O8(F,OH) Mono

65.02.01.08 Tanohataite! LiMn2Si3O8(OH) P1 1

Help on Strunz Class: Strunz Class:

09.HA.85 09 - SILICATES (Germanates)

09.H - Unclassified Silicates

09.HA -With alkali and alkali-earth Elements

09.HA.85 Denisovite (K,Na)Ca2Si3O8(F,OH) Mono

Other Denisovite Information

Help on References: References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Help on See Also: See Also:

Links to other databases for Denisovite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Denisovite

(K,Na)Ca2Si3O8(F,OH)
Dana No: 65.02.01.07 Strunz No: 09.HA.85
Locality:

Notes: