Watatsumiite Mineral Data

[New Updates] [Gallery 1] [Gallery 2] [Gallery 3] [Rock Shop Gallery]
Serving the mineral collector and educator community since 1970
Over 900,000 mineral specimens in stock
New minerals acquired weekly - Wright's Rock Shop

General Watatsumiite Information

Chemical Formula:

Na2KMn2LiV2Si8O24

Composition:

Molecular Weight = 905.03 gm

Potassium 4.06 % K 4.89 % K₂O

Barium 0.76 % Ba 0.85 % BaO

Sodium 5.28 % Na 7.12 % Na₂O

Lithium 0.74 % Li 1.60 % Li₂O

Magnesium 0.97 % Mg 1.60 % MgO

Titanium 1.90 % Ti 3.18 % TiO₂

Manganese 9.53 % Mn 12.31 % MnO

Vanadium 9.34 % V 16.68 % V₂O₅

Iron 0.25 % Fe 0.32 % FeO

Silicon 24.73 % Si 52.91 % SiO₂

Oxygen 42.43 % O

______ ______

100.00 % 101.46 % = TOTAL OXIDE

Empirical Formula:

K_0.94Ba_0.05Na_2.08Li_0.97Mn²⁺_1.57Mg_0.36Fe²⁺_0.04V⁵⁺_1.66Ti_0.36Si_7.97O₂₄

Environment:

Closely associated with potassicleakeite in the dump material from the No. 3 orebody (metamorphosed Mn ore). (isostructural with neptunite; structure)

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Tanohata mine, Iwate Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named after watatsumi, Japanese god of the sea as is the analogue (neptunite) neptune, Roman god of the sea.

Synonym:

IMA2001-043

Watatsumiite Image

Images:

Click Here for Larger Watatsumiite Image

Watatsumiite Potassicleakeite

Comments: Yellow green prismatic crystal of watatsumiite terminated by pyramidal faces associated with reddish brown potassicleakeite and clear quartz (JMPS, v 98, p 149).
Location: Tanohata mine, Iwate Prefecture, Japan. Scale: See Image.
© JMPS

Watatsumiite Crystallography

Axial Ratios:

a:b:c =1.3168:1:0.8001

Cell Dimensions:

a = 16.45, b = 12.492, c = 9.995, Z = 4; beta = 115.32° V = 1,856.59 Den(Calc)= 3.24

Crystal System:

Monoclinic - DomaticH-M Symbol (m) Space Group: Cc

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

By Intensity(I/I_o): 3.19(1)(330,132), 2.49(0.93)(441,621), 2.94(0.9)(223), 4.52(0.85)(002), 9.58(0.84)(110), 2.9(0.66)(222,510), 3.52(0.63)(131),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Matsubara S , Miyawaki R , Kurosawa M , Suzuki Y , Journal of Mineralogical and Petrological Sciences , 98 (2003) p.142-150, Watatsumiite, KNa2LiMn2V2Si8O24, a new mineral from the Tanohata mine, Iwate Prefecture, Japan, Locality: metamorphosed manganese ore deposit, Tanohata mine, Iwate Prefecture, Japan

Physical Properties of Watatsumiite

Cleavage:

{???} Poor

Color:

Yellow green.

Diaphaneity:

Translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous (Glassy)

Streak:

greenish white

Optical Properties of Watatsumiite

Gladstone-Dale:

CI calc= 0.086 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.216,KC= 0.2364
Ncalc = 1.77

Optical Data:

Biaxial (+), a=1.686, b=1.694, g=1.72, bire=0.0340

Calculated Properties of Watatsumiite

Electron Density:

Bulk Density (Electron Density)=3.16 gm/cc
note: Specific Gravity of Watatsumiite =3.24 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Watatsumiite= 9.17 barns/electron
U=PE_Watatsumiite x r_electron= 28.93 barns/cc.

Radioactivity:

GRapi = 57.05 (Gamma Ray American Petroleum Institute Units)
Concentration of Watatsumiite per GRapi unit = 1.75 (%)

Estimated Radioactivity from Watatsumiite - barely detectable

Watatsumiite Classification

Dana Class:

70.04.01.03 (70)Inosilicate Column or Tube Structures

(70.04)with linked chains forming cages

(70.04.01)Neptunite group

70.04.01.01 Neptunite KNa2Li(Fe,Mn)2Ti2Si8O24 Cc m

70.04.01.02 Manganoneptunite KNa2Li(Mn,Fe)2Ti2Si8O24 C 2/m 2/m

70.04.01.03 Watatsumiite! Na2KMn2LiV2Si8O24 Cc m

70.04.01.04 IMA2009-009 KNa2Li(Mg,Fe)2Ti2Si8O24 C 2/m 2/m

Strunz Class:

09.EH.05 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EH -Transitional structures between phyllosilicate and other silicate units

09.EH.05 Neptunite KNa2Li(Fe,Mn)2Ti2Si8O24 Cc m

09.EH.05 Manganoneptunite KNa2Li(Mn,Fe)2Ti2Si8O24 C 2/m 2/m

09.EH.05 Watatsumiite! Na2KMn2LiV2Si8O24 Cc m

Other Watatsumiite Information

References:

NAME( AmMin, v 89, p 896) PHYS. PROP.(AmMin, v 89, p 896) OPTIC PROP.(AmMin, v 89, p 896)

See Also:

Links to other databases for Watatsumiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Watatsumiite using:

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

Visit our Advertisers for Watatsumiite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Watatsumiite Mineral Data :

Ask about Watatsumiite 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 Watatsumiite Specimen Label here :

Watatsumiite

Na2KMn2LiV2Si8O24
Dana No: 70.04.01.03 Strunz No: 09.EH.05
Locality:

Notes: