Pinnoite Mineral Data

Pinnoite Mineral Data +

[Newest Minerals] [Minerals for Sale] [Educational Articles] [About Us] [Image Gallery]
John Betts - Fine Minerals
Classic minerals, out-of-print books & magazines, plus informative articles for collectors

General Pinnoite Information

Chemical Formula:

MgB2O4·3(H2O)

Composition:

Molecular Weight = 163.97 gm

Magnesium 14.82 % Mg 24.58 % MgO

Boron 13.19 % B 42.46 % B₂O₃

Hydrogen 3.69 % H 32.96 % H₂O

Oxygen 68.30 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

MgB₂O₄·3(H₂O)

Environment:

Evaporite salt deposits.

IMA Status:

Valid Species (Pre-IMA) 1884

Locality:

Stassfurt and Aschersleben, Saxony, Germany. Eagle Borax works, Death Valley, California, USA. Link to MinDat.org Location Data.

Name Origin:

Named for chief councilor of Mines, Pinno, of Halle, Germany.

Synonym:

ICSD 20662

PDF 25-119

Pinnoite Image

Images:

Pinnoite Inderite

Comments: Pale green translucent crystalline pinnoite on chalky white inderite.
Location: Lake Inder, Atyrau, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Pinnoite Crystallography

Axial Ratios:

a:c = 1:1.07522

Cell Dimensions:

a = 7.617, c = 8.19, Z = 4; V = 475.17 Den(Calc)= 2.29

Crystal System:

Tetragonal - PyramidalH-M Symbol (4) Space Group: P 4₂

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

By Intensity(I/I_o): 5.39(1), 2.31(0.7), 2.05(0.5),3.16(0.4), 1.91(0.3), 2.25(0.3), 1.57(0.2),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: [ 1 1 2] [ 1 1 0] [ 0 1 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Physical Properties of Pinnoite

Cleavage:

[???] Indistinct

Color:

Colorless, Yellow, Yellow green, Light yellow.

Density:

2.29

Diaphaniety:

Translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

3.5 - Copper Penny

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Pinnoite

Gladstone-Dale:

CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2489,KPDmeas= 0.2489,KC= 0.2525

Optical Data:

Uniaxial (+), w=1.565, e=1.575, bire=0.0100.

Calculated Properties of Pinnoite

Electron Density:

r_electron=2.35 gm/cc
note: r_Pinnoite=2.29 gm/cc.

Fermion Index

Fermion Index = 0.04139
Boson Index = 0.95861

Photoelectric:

PE_Pinnoite= 0.58 barns/electron
U=PE_Pinnoite x r_electron= 1.36 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Pinnoite is Not Radioactive

Pinnoite Classification

Dana Class:

25.2.3.1 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.2)Dana Type

(25.2.3)Dana Group

25.2.3.1 Pinnoite MgB2O4·3(H2O) P 4₂ 4

Strunz Class:

V/H.04-10 V - Nitrates, Carbonates and Borates

V/H - Group borates. Planary groups [B2O5]4- to [B2O7]2-

V/H.04 - Pinnoite - Pentahydroborite series

V/H.04-10 Pinnoite MgB2O4·3(H2O) P 4₂ 4

V/H.04-20 Satimolite KNa2Al4(B2O5)3Cl3·13(H2O) Unk Ortho

V/H.04-30 Pentahydroborite CaB2O(OH)6·2(H2O) P1 1

Other Pinnoite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

Search for Pinnoite using:

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

Visit our Advertisers for Pinnoite :

AA Mineral Specimens

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

MineralsWeb Fine Minerals

The GeoZone

Wrights Rock Shop

Translate Pinnoite Mineral Data :

Ask about Pinnoite 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 Pinnoite Specimen Label here :

Pinnoite

MgB2O4·3(H2O)
Dana No: 25.2.3.1 Strunz No: V/H.04-10
Locality:

Notes: