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Santite

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Santit
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1587394612
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Santit
farbloses Aggregat von Santit, Larderello, Pomarance, Pisa, Toskana, Italien; BB ~ 1 mm
Copyright: Joy Desor; Contribution: openpit
Location: Italien/Toskana (Toscana)/Pisa, Provinz/Pomarance/Larderello
Mineral: Santite
Image: 1587394612
License: Usage for Mineralienatlas project only
Santit

farbloses Aggregat von Santit, Larderello, Pomarance, Pisa, Toskana, Italien; BB 1 mm

Copyright: Joy Desor
Contribution: openpit 2020-04-20
Locality: Larderello / Pomarance / Pisa, Provinz / Toskana (Toscana) / Italien

Collectors Summary

Color farblos
Streak color weiß
Solubility +++ H2O
Crystal System orthorhombisch, Abav2

Chemism

Chemical formula

KB5O6(OH)4·2H2O

Chemical composition

Bor, Kalium, Sauerstoff, Wasserstoff

Unit weight: 293.213546 u; Number of atoms in the formula: 26

Info

Empirical formula:

KB5O6(OH)4·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.75

8

30.77

1.0079470

8.0635760

Boron

B

18.44

5

19.23

10.8117000

54.0585000

Oxygen

O

65.48

12

46.15

15.9994300

191.9931600

Potassium

K

13.33

1

3.85

39.0983100

39.0983100

Analysis wt%

K2O : 16.06, B2O3 : 59.36, H2O : 24.58 (Ref: berechnet)

Strunz 9th edition incl. updates

6.EA.10

6: Borate
E: Pentaborate
A: Insel(Neso)-Pentaborate
10:Santit-Gruppe

Lapis Classification

V/H.15-020

V: NITRATE, CARBONATE UND BORATE
H: Gruppenborate
15: Planare und tetraedrische Gruppen [B3O5] 1- bis [B6O10] 2-

Classification by Hölzel

6.EA.130

6: Borates
E: Pentaborates
A: Nesopentaborates
1: Sborgite-Group - 5(4P+T)

Dana 8th edition

26.05.02.01

26: Hydrated Borates Containing Hydroxyl or Halogen
05: Hydrated Borates Containing Hydroxyl or Halogen
02: Santite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

max. Birefringence

0.058

Birefringence chart\! Santite title=Birefringence chart Santite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.422

RI value β

1.435

RI value γ / ε

1.480

Ri mean

1.446

2V angle

Biaxial (+) 60°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mm2

Space Group number

41

Space Group

Abav2

Cell parameters a (Å)

11.10

Cell parameters b (Å)

11.18

Cell parameters c (Å)

9.08

Cell parameters a/b or c/a

0.993

Cell parameters c/b

0.812

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

1126.81

X-Ray Powder Diffraction

5.93(10),
5.60(70),
3.52(80),
3.36(100),
3.28(20),
2.767(50),
2.517(10),
2.181(20)

XRD chart Santite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

1.735 (gemessen)

1.728 ( ρ calc. Mineralienatlas )

Instability

+++ H2O

Preface

Author (Name, Year)

Merlino & Sartori, 1970

References

Contributions to Mineralogy and Petrology 27 (1970), 159

Other languages

German

Santit

Spanish

Santita

English

Santite

French

Santite

Russian

Сантит

CNMNC (IMA)-Number

IMA 1969-044

CNMNC symbol

Symbol

Snt