Sanidine Mineral Data (original) (raw)

General Sanidine Information

Help on Chemical Formula: Chemical Formula:

(K,Na)(Si,Al)4O8

Help on Composition: Composition:

Molecular Weight = 274.30 gm

Potassium 10.69 % K 12.88 % K2O

Sodium 2.10 % Na 2.82 % Na2O

Aluminum 9.84 % Al 18.59 % Al2O3

Silicon 30.72 % Si 65.71 % SiO2

Oxygen 46.66 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

K0.75Na0.25AlSi3O8

Help on Environment: Environment:

Acid volcanic rocks.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1808

Help on Locality: Locality:

Common world wide occurrences. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

From the Greek sanis - "little plate" and idos - "to see."

Help on Name Pronunciation: Name Pronunciation:

Sanidine Say SANIDINE

Sanidine Image

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

Click Here for Larger Sanidine Image Sanidine Comments: Blocky, opalescent crystal of sanidine. Location: Mina La Pili, Carmago, Chihuahua, Mexico.Scale: Crystal size 3x2 cm. © Dave Barthelmy

Sanidine Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.6588:1:0.5534

Help on Cell Dimensions: Cell Dimensions:

a = 8.562, b = 12.996, c = 7.193, Z = 4; beta = 116.016° V = 719.28 Den(Calc)= 2.53

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.26(1), 3.22(0.9), 3.27(0.75),

Help on Forms: Forms:

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| | Forms:( 1 1 0) ( 1 0 1) ( 0 0 1) ( 0 1 0) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Sanidine Structure Window Crystal Structure:

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| | Phillips M W , Ribbe P H , American Mineralogist , 58 (1973) p.263-270, The structures of monoclinic potassium-rich feldspars View Additional jPOWD Structure files for Sanidine [1] [10] [11] [12] [2] [3] [4] [5] [6] [7] [8] [9] | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Sanidine

Help on Cleavage: Cleavage:

{001} Perfect, {010} Good

Help on Color: Color:

Colorless, White, Gray, Yellowish white, Reddish white.

Help on Density: Density:

2.52

Help on Diaphaneity: Diaphaneity:

Transparent to translucent

Help on Fracture: Fracture:

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

Help on Habit: Habit:

Blocky - Crystal shape tends to be equant (e.g. feldspars).

Help on Habit: Habit:

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

Help on Habit: Habit:

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

Help on Hardness: Hardness:

6 - Orthoclase

Help on Luminescence: Luminescence:

Non-fluorescent.

Help on Luster: Luster:

Vitreous - Pearly

Help on Streak: Streak:

white

Optical Properties of Sanidine

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2076,KPDmeas= 0.2085,KC= 0.2058
Ncalc = 1.52

Help on Optical Data: Optical Data:

Biaxial (-), a=1.518-1.525, b=1.523-1.53, g=1.525-1.531, bire=0.0060-0.0070, 2V(Calc)=48-64, 2V(Meas)=60-0. Dispersion r < v distinct.

Help on Pleochroism (x): Pleochroism (x):

colorless.

Help on Pleochroism (y): Pleochroism (y):

colorless.

Calculated Properties of Sanidine

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.51 gm/cc
note: Specific Gravity of Sanidine =2.53 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Help on Photoelectric: Photoelectric:

PESanidine = 2.57 barns/electron
U=PESanidine x relectron= 6.44 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 152.94 (Gamma Ray American Petroleum Institute Units)
Concentration of Sanidine per GRapi unit = 0.65 (%)

Estimated Radioactivity from Sanidine - barely detectable

Sanidine Classification

Help on Dana Class: Dana Class:

76.01.01.02 (76)Tectosilicate Al-Si Framework

(76.01)with Al-Si frameworks

(76.01.01)K (Na,Ba) feldspars

76.01.01.01 Orthoclase KAlSi3O8 C 2/m 2/m

76.01.01.02 Sanidine (K,Na)(Si,Al)4O8 C 2/m 2/m

76.01.01.03 Hyalophane (K,Ba)Al(Si,Al)3O8 C 2/m 2/m

76.01.01.04 Celsian BaAl2Si2O8 I21/c 2/m

76.01.01.05 Microcline KAlSi3O8 C1 1

76.01.01.06 Anorthoclase (Na,K)AlSi3O8 C1 1

76.01.01.07 Rubicline! (Rb,K)AlSi3O8 P1 1

76.01.01.08 Filatovite! K[(Al,Zn)2(As,Si)2O8] I2/c 2/m

Help on Strunz Class: Strunz Class:

09.FA.30 09 - SILICATES (Germanates)

09.F - Tektosilicates without Zeolitic H2O

09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1

09.FA.30 Buddingtonite (NH4)AlSi3O8•0.5(H2O) P 21 or P 21/m Mono

09.FA.30 Celsian BaAl2Si2O8 I21/c 2/m

09.FA.30 Anorthoclase (Na,K)AlSi3O8 C1 1

09.FA.30 Hyalophane (K,Ba)Al(Si,Al)3O8 C 2/m 2/m

09.FA.30 Orthoclase KAlSi3O8 C 2/m 2/m

09.FA.30 Microcline KAlSi3O8 C1 1

09.FA.30 Rubicline! (Rb,K)AlSi3O8 P1 1

09.FA.30 Sanidine (K,Na)(Si,Al)4O8 C 2/m 2/m

Other Sanidine Information

Help on See Also: See Also:

Links to other databases for Sanidine :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - CalTech Mineral Spectroscopy
7 - EUROmin Project
8 - Ecole des Mines de Paris
9 - GeoScienceWorld
10 - Google Images
11 - Google Scholar
12 - Handbook of Mineralogy (MinSocAm)
13 - Handbook of Mineralogy (UofA)
14 - MinDAT
15 - Mineral and Gemstone Kingdom
16 - Mineralienatlas (Deutsch)
17 - Minerals in Thin Sections-Humboldt State
18 - Online Mineral Museum
19 - QUT Mineral Atlas
20 - Ruff.Info
21 - UCLA - Petrography Thin-Sections
22 - WWW-MINCRYST

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Ask about Sanidine here :
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Print or Cut-and-Paste your Sanidine Specimen Label here :

Sanidine

(K,Na)(Si,Al)4O8
Dana No: 76.01.01.02 Strunz No: 09.FA.30
Locality:

Notes: